User Profile

A user profile is their personal account, which can be linked to an account on a corporate server. Thus:

Profile Type	Description
Public Profile	A registered personal account not linked to an account on a corporate server.
Corporate Profile	A registered personal account linked to an account on a corporate server.
Guest Profile	A temporary profile without registration for joining a chat or conference via an invitation link.

Is It Possible to Use Several Different Profiles Simultaneously in the Application?

This feature is not available. To switch to another profile, you need to log out of the session in the previous profile.

Profile Identification by HUID

The unique identifier of a profile is not a mobile phone number, login, or email, but the HUID (Human Unique Identifier) of the personal account. The HUID consists of 32 alphanumeric characters separated by hyphens.

For Administrators: More about HUID

Can a User HUID Change?

The HUID of a personal account cannot be changed to another.

CTS

eCTS

However, the HUID of a corporate account, which is displayed in the corporate server (

CTS

/

eCTS

) admin panel, is temporary until the user's first login (see below).

It is the HUID of the personal account that identifies all user data stored on the servers. The HUID is also associated with personal encryption keys. When you change the linked phone number in your profile, the HUID remains unchanged.

What Happens When Connecting to a Corporate Server?

Lite

CTS

eCTS

Upon the first login to a corporate account, the system finds or creates a user's personal account on

RTS

/

ETS

and copies its HUID, replacing the temporary dummy HUID of the corporate account with it. This always happens, even if the user authenticates only using their corporate email or server address and has never used eXpress before: in this case, an unnamed personal account is automatically created on

RTS

/

ETS

, and its HUID becomes the user's permanent identifier.

When is a New HUID Generated?

A new personal account HUID is created only when a new personal account is created in the following cases:

• registering a new account;
• the old account was deleted, and the user registers with the same phone number for a new account.

CTS

eCTS

HUID of a previously created corporate account on a

CTS

/

eCTS

changes once — upon the user's first login, when the temporary dummy HUID is replaced with the permanent HUID of the personal account from

RTS

/

ETS

.

How to Check My HUID?

Your HUID can be viewed by your organization's system administrator or eXpress Support, and it is also present in the profile link and in the app's engineering menu.

Encryption Keys

When a personal account is created, encryption keys are generated to protect user data. The private part of the encryption keys can be secured by the personal password for additional data security.

Personal Account (also referred to as an external or public profile) allows to use eXpress free of charge. It is created:

when a user registers in the eXpress app — on

RTS

. eXpress users registered with a personal account have green badges.

when registering in a branded app — on

ETS

and

RTS

(if there is no isolation). You cannot use a personal account in such an app.

What Is the Personal Account Responsible For?

A personal account is not only a free profile in eXpress, but also is the basic identification entity of a user in the whole system. Despite the ability to connect users to various servers (///), the unchanging identifier remains the HUID, which is tied specifically to the personal account of a user, which is created almost for any registration. This ensures seamless user identification within the system regardless of the servers and even apps used.

Can I Stay in a Personal Account on the Public Server?

Yes, but only in the eXpress app. Start registration with an unused mobile phone number and don't connect to the corporate server or don't accept the eXpress invitation in the next notification or in the profile settings to remain a “green” user of the public server .

Personal Account on ETS

In custom branded apps for , you cannot log in to a personal account; it exists solely for internal purposes for identification. Additionally, if is not isolated, a personal account is also created on during registration, to enable interaction with other users in the federation.

Features of an eXpress Public Server Profile

If you haven't connected to a corporate server and are using eXpress on the public server, then:

• You can send files no larger than 250 MB (corporate users have a limit of 1 GB).
• Creating conferences is not available, but you can join conferences hosted by corporate users by invitation.
• Corporate features such as Tags, Reminders, SmartApps, and Confidential Mode are not available (if a group chat or channel includes a personal account user, this mode cannot be enabled).

Creating an eXpress Personal Account

You can create a personal account in eXpress on your own and use it. Instructions for registering a personal account on a public server are available in the section Registering or Logging In to eXpress.

Provided to the user in eXpress or a branded app by their organization (employer) under a paid corporate license. In the app, a corporate user have a blue icon.

Connecting a Personal Account to a Corporate Account

A personal account can be linked to a corporate account to become a corporate user. The process differs between the eXpress app and custom-branded client apps:

App	Becoming a corporate user
eXpress	Lite CTS In the eXpress app, a personal account user can transition to a corporate user by logging into the corporate account via Settings (avatar button) > Login for corporate users or Accept Invitation (eXpress Lite ). The correspondence from the personal account will remain accessible. Use your phone number and connect your personal account to the corporate server in eXpress to retain your previous chat history from the public RTS server.
Branded App	ETS In custom-branded ETS apps you must log in to the corporate account directly. However, you can log in using your personal account phone number, which associates it with your corporate account. Note that correspondence from the personal account will be unavailable until you log out of the corporate server.

Instruction for Corporate Regustration in eXpress

To learn how to obtain a corporate eXpress account and log in, refer to the Registering or Logging In to eXpress section.

Corporate Account Features

Server	Features
Lite	An eXpress Lite corporate account has fewer capabilities than a regular corporate account on CTS — more details.
CTS eCTS	Users with a corporate account have access to all corporate features within the app. However, your organization may enforce certain restrictions (for example, limiting access to the corporate server to specific IP addresses). For more details, contact your organization's support team. Additionally, access may be restricted for different user groups through the Role Model.

Creating a Corporate Account

A Corporate Account is created and managed:

Server	Methods
Lite	Automatically when an invitation is sent by the eXpress Lite server administrator — more details (in Russian only).
CTS eCTS	Automatically when synchronizing with the corporate directory Active Directory or OpenID. For the first login, users authenticate through these systems. Manually, when the administrator creates a corporate account in the Users section (the first and second methods of creating users can be combined if the Email authentication method is selected). Such users log in to the app using a confirmation code sent to the associated email address. Automatically when a new user registers and enters their email address (self-registration). Later, via the Contacts Bot (if installed on the corporate server), the administrator of this bot can complete the user's personal data. Other users can access this data only through the bot, as it is not managed on the server or in AD. Such users log in to the app using a confirmation code sent to the associated email address.

Can a User Become Corporate With Only a Phone Number?

Server	Description
Lite	Yes.
CTS eCTS	No — must have either an email or AD/OpenID credentials to log in.

Guest Profile is created automatically when a user joins as a guest via a group chat or channel link or via a group call or conference link.

What Functionality Is Limited for Guests?

Guest profiles have limited functionality: mentions, personal messages, access to other chats on a server (only via invitation), access to other calls, personal settings, creating threads, and access to chats or calls after ending a session are not available.

Where Are Guest Profiles Created?

On by default.

Will I Be Able to Re-enter the Same Chat Using the Same Link as a Guest?

Yes, but if cookies or web app data in your browser have been cleared in the meantime, you will have to create a new guest account to join the chat. Additionally, the invitation link must not have expired.

Profile Avatar Picture

To change your profile avatar, in the app open Settings (avatar button) > Profile > three-dot button > select Edit profile.

Cannot Change the Avatar of a Corporate Profile?

Changing avatars for corporate profiles must be enabled in the server settings, otherwise contact your support. If preliminary moderation of changes is enabled on the corporate server, administrator confirmation will be required. For more details, contact your organization's support team.

Name and Other Personal Details

Server	Changing Personal Data
RTS Lite	To change your profile name, in the app open Settings (avatar button) > Profile > three-dot button > select Edit profile.
CTS eCTS	Personal data for corporate accounts is managed by the organization. To change the surname, for example, or other personal details in a corporate account, contact your organization's support team.

Mobile Phone Number Associated with Profile

Server	Mobile Phone Number
RTS Lite	Is mandatory for account.
CTS eCTS	May be optional if allowed by the administrator. You can link a mobile phone number to your profile. This will enable SMS verification code requests when logging into the app. An administrator can configure the system to skip secondary SMS verification when your device is on a secured corporate network.

Why Is It Advisable to Add a Phone Number?

⚠️ It is highly recommended to sign in to the app with a phone number if you have used this number in the app before. If no phone number is added, add it to your profile, but only if no other account is associated with it. This ensures your correspondence is preserved when switching accounts.

How to Find Out If a Phone Number Is Linked to My Account?

• Open your profile in the app.
• A
  CTS
  /
  eCTS
  administrator can view the account type to check how the user registered.

Can I Add Multiple Numbers to Profile?

No. Only one phone number can be associated with a profile.

Can I Link a Number Already Associated With Another Profile?

No. A phone number can only be linked to one profile.

How Can I Edit or Remove Associated Phone Number?

To change or remove the phone number in your profile, in the app open Settings (avatar button) > Profile > three-dot button > select Edit profile. Changing or removing phone numbers must be enabled in the server settings. For more details, contact your organization's support team.

I Logged Into the App Without a Phone Number, but Still Got an SMS Verification Request. Why?

This means that a phone number is linked to the account. If it was detected, the system will request verification. The administrator can disable the verification request for the detected number if you are on a secure corporate network, using the server settings.

Can I Share My Phone Number in the App?

You cannot grant another user access to your mobile phone number through the app. However, you can send contact cards from your phone book, which may include this information.

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❓Related Topics:
• Cannot Change Phone Number or Lost Access to the Previous Number
• Low Quality of eXpress Avatar Uploaded via OWA Portal
• Change Requests List (CTS/eCTS)
• Admin Panel's “Server” Section
• Updated Data of One User Is Not Visible to Another
• “Phone Number Is Already Used. Unlink It from Another Account” Error
• “An Error Has Occurred. Try Again Later” When Changing to a Number from Another Country

You can set a status that will be displayed next to your name for other users: Settings (avatar button) > Profile. The feature is available starting from version 3.40 (server software and clients). Additional functionality is planned for future updates.

Status Features

• Select a predefined status or create your own with emoji
• Set the duration: permanent or temporary (for example, during vacation)
• Manage notifications: disable all or configure exceptions
• Reject incoming calls: disable all or configure exceptions
• Set an auto-reply for users who message you

Why Did My Status Change Not Update for My Colleagues?

If you change your status, it will update for other users:

• Automatically every 30 minutes
• Instantly after they open your contact card

Going on Vacation? How to Notify Your Colleagues

Before your vacation (e.g., two weeks in advance), create a special status to inform colleagues you'll soon be away. Also set up an “On Vacation” status to activate on your last workday. You can configure both statuses to automatically turn off at specified times.

Automatic System Statuses

There are also profile statuses set by the system automatically: “online” or “in a call”.

Visibility of Corporate Account Personal Data

Can I Control What Corporate Information Others Can See?

The organization’s administrator can configure globally on a server which corporate account data is visible to other users. For more details, contact your organization's support team.

How to Hide My Server From Others?

The name and address of the corporate server can also be hidden from others (for public users, they are always hidden). For more details, contact your organization's support team.

Phone Number Linked with Account

Who Can See My Mobile Phone Number?

If you registered in the app using a phone number or added a phone number, it will be visible to another user who has your number saved in their phone book. Other users will not see your phone number.

Can I Hide Myself From Others' Contacts Even If They Have My Number?

This feature isn't currently supported.

Other Contact Security Questions

Can I Hide My Profile From Colleagues or Enable an Invisible Status?

These features aren't currently available.

How to Block a Contact?

The contacts blocklist is under development.

I Suspect One of My Public Contacts Has Been Hacked. What Should I Do?

Contact eXpress support as soon as possible to investigate the incident with a public contact and take action.

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❓ Related Topics:
• Cannot Change Phone Number or Lost Access to the Previous Number

Logout is typically needed when you change jobs to unlink your profile from the previous corporate server.

What is Logout?

Logout is the process of disconnecting from a corporate server, where a personal account on or loses its association with a corporate server , or , or . After this, the user profile ceases to be corporate and loses access to all corporate properties and data. After logout, i.e. leaving the previous corporate server, you can switch to another corporate server.

Types of Logout

There are several methods for logout requests:

Logout Request	Lite	CTS eCTS
At the user's request After logging into the corporate server account, go to Settings (avatar button) > Profile > Corporate Information and click the Leave the server button.	Logout will happen automatically. The administrator will see the bot notification that the user left the server.	A logout request will be sent to the corporate server. The corporate server administrator must approve your request to complete the logout. Until then, you will lose access to the app's corporate features on the current device. If you log in to the app again without using a QR code, the logout request will be canceled and removed from the Admin Panel.
Manually by an administrator Contact your administrator and request a manual logout.	The eXpress Lite administrator must remove you from the server through the bot.	The corporate server administrator must approve your request in the admin panel to complete the logout. Until then, you will remain logged into the app.
Through the corporate directory AD/OpenID	-	A logout request is generated when a specific event occurs in the corporate directory. The corporate server administrator must approve your request to complete the logout. For example, if your account is locked in Active Directory, you will immediately lose access to the app's corporate features and will not be able to return to the corporate account (unless the NTLM registration method is enabled).
When deleting an account in the app's settings	When a personal account is deleted, logout is automatically performed for the corporate account linked to it.	When a personal account is deleted, a logout request is sent for the associated corporate account. The server administrator must approve the request to complete the logout and disconnect the corporate account from the deleted personal account. The corporate server administrator can configure the system to automatically perform logout when user accounts are deleted, without requiring confirmation. For more details, contact eXpress Support.

Automatic Logout Without Confirmation

The corporate server administrator can configure all logout requests to be confirmed automatically without their confirmation. This feature is disabled by default. For more details, see the descriptions of the admin panel sections: “Active Directory” and “OpenID”.

Additional Questions

Who Performs the Logout?

Since corporate information is the property of the organization, when an employee leaves, their logout must be performed by the system administrator of their previous employer. If your account remains associated with the corporate server of your previous employer after moving to another organization, contact eXpress Support — we will reach out to your previous employer to facilitate the logout.

What Happens While the Logout Request is Pending?

Until the administrator confirms the logout, your account will remain linked to the previous corporate server, and you will not be able to log in to another server using your phone number (if applicable). Whether you'll be logged out of the app while the request is active depends on the request type (see above).

What Happens After Logout?

Access to corporate correspondence will be lost, as logout is equivalent to termination, and corporate correspondence is the property of the organization. Only correspondence from when you were a public user will remain, if any.

What Will My Profile Look Like After Logout?

How other users will see your profile after logout:

1. The personal chat with you for other users will be displayed with the name of the eXpress public account or Unknown User (if registered without a phone number or in an
   ETS
   app).
2. Concerning associated phone number:

   Phone Number/Used App	Description
   Had a phone number and were using eXpress or a non-isolated ETS client app	After logout you will become a public “green” user. Other users will be able to continue communicating with you in personal chats or in new group chats and channels. If you then log in to the corporate server without a phone number, you will have two accounts: a public one with a phone number and your old correspondence, and a corporate one without a phone number and without old correspondence.
   Did not have a phone number in eXpress or used a dedicated ETS app in isolated environment	After logout you will not become a public “green” user. Other users will not be able to communicate with you in the app. What other users will see when trying to interact with you after logout in this case: the old chat with you will remain in the chat list but will not appear in contact search results; when attempting to send you a message, they will see the error "User no longer has access to the application. Message will not be delivered"; when attempting to call you, they will see a warning that the call cannot be completed; the Reply privately button will be unavailable in the message context menu; your profile details will not change to those of your personal account on RTS . If you then log in to the corporate server, other users will see two chats with you but will only be able to use one of them. The other will remain for historical purposes.

What About Group Chats & Channels I Admin — what happens to them?

You will also be removed from all corporate group chats and channels, even those where you were an administrator. A new administrator will be automatically assigned by the system.

Can I Return to the Previous Server After Logout?

If after logging out your corporate account with a phone number associated with it, you log in to the app on the same corporate server with the same phone number, then:

• your personal chats will have their corporate history restored;
• in group chats and channels, the history will be restored after you rejoin them;
• call history will be restored (group call names will reappear after accessing the corresponding chats; until then, a list of participants will be displayed);
• to restore conferences, you will need to rejoin them.

How Phone Number Binding Protects Your Message History?

This is possible because the server identifies you by your HUID, which remains unchanged. If you use a phone number, even if you log in to another account on the old corporate server with the same phone number (and thus the same HUID), your previous corporate correspondence will be restored. If the logout occurred due to the deletion of a personal account, or you log in again without a phone number, the correspondence will not be restored, as a new HUID is created during registration.

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❓Related Topics:
• Another User's Profile Appears Twice in the App

If your login or email address has changed (e.g., due to a name change), contact your organization's support team to update your current account or create a new one.

How to Preserve Chat History After Login Change?

⚠️ Changing a login may require logging out of the corporate server if the server software version is below 3.43. If you registered without a phone number, changed your number after logout, or reset your personal password, previous chat history will be permanently lost as a new account with a new HUID will be created.

To preserve chat history, add a phone number to your account before changing your login. This ensures the HUID associated with your chats remains the same, even if the old account is logged out.

To Administrartor: Changing User Login (Email)

Actions depend on account creation method:

Account Synced From AD or OpenID?

Is a New Account Created?	Description
Login changes in directory do create new accounts (pre-v3.43 server software)	Have the user add a phone number to preserve chat history (if haven't). Perform and confirm logout of the old account. Synchronize CTS / eCTS with directory. Verify new account creation with correct login. Have the user log into the new account using the phone number login option.
Login changes don't create new accounts (v3.43 or above server software)	Synchronize CTS / eCTS with directory. Verify email update in existing account. Have the user log in with new login.

Manually Created Admin Panel Accounts?

Backend Version	Description
Server software prior version 3.50	Email = login and cannot be changed directly. Solution: Have the user add a phone number to preserve chats. Create new account with desired email. Perform and confirm logout of old account. Have the user log into the new account using their phone number (to transfer chat history).
Server software version 3.50 and above	In the user profile, select Edit > change the E-mail field and save the changes.

OpenID Sync Issues?

If OpenID changes created a new corporate account, contact eXpress support.

My Actions After Login Change?

After admin completes these steps, log in with your new credentials. ⚠️ If logout occurred during the change, log in using your previously added phone number and don't reset your data protection personal password (if set) to preserve chat history.

After returning to the server with a new login (post-logout), you'll need to rejoin corporate group chats and channels to load their history. Identify required chats from your old account before admin confirms logout.

You can permanently delete your personal account, even if your profile is corporate:

1. In the app, open Settings (click your avatar above the chat list).
2. Go to the Profile section.
3. Click the three dots button > select Delete Account > confirm the action.

Additional Questions

Can Account Deletion Be Canceled?

⚠️ This action cannot be undone even via the corporate administrator: after deletion, you will lose access to all chats, contacts, and message history, as they are tied to your HUID.

Sounds Dangerous. Why Was This Feature Added?

This feature was added to the app at the request of app stores and cannot be disabled.

What Happens After Account Deletion?

Your registered phone number will be freed up for reuse. The chat history from the old account will become inaccessible because - even if you create a new account — you'll receive a new HUID.

When deleting a personal account associated with a corporate account:

Server	Description
Lite	Logout will happen automatically. The administrator will see a bot notification that the user left the server.
CTS eCTS	A logout request is automatically sent to the corporate server. The administrator must approve the logout — otherwise, the phone number (if linked) will remain blocked for reuse. Even if the administrator rejects the logout request, the account will remain deleted permanently. On some servers, logout is performed automatically when deleting account. To check your corporate server’s configuration, contact eXpress support.

How Will My Profile Appear After Account Deletion?

Other users will see your personal chat displayed as Deleted.

Can I Periodically Delete My Account for Maintenance?

⚠️ Do not delete your personal account unless absolutely necessary! If you are a corporate user, coordinate this with your administrator first.

Cannot Change Phone Number or Lost Access to the Previous Number

If the ability to manage the phone number by your own is disabled by administrator, or you lost access to the previous phone number, follow these steps to change it:

You still have access to the previous number (corporate account)

Sign in to your corporate account with the old number, go to Settings (avatar button) > Profile > Corporate Information > Leave the server. If you are an eXpress Lite user, logout from the server will happen automatically. The server administrator will receive a notification. For corporate CTS / eCTS server a logout request will be sent. The corporate server administrator must confirm the request. After that, register with a new phone number, next, enter your corporate account credentials to sign in and link it to your new phone number.

You've lost access to the previous number

You will permanently lose access to your previous profile on the public server RTS . ⚠️ If you have been the victim of malicious activity, contact eXpress support. After that, register with a new phone number. If you were a corporate user, ask the administrator to log you out manually (take you off from the corporate server CTS / eCTS ). After that, register with a new phone number, next, enter your corporate account credentials to sign in and link it to your new phone number.

“Phone number is already used. Unlink it from another account to use it in this one” Error

If you are trying to add or change a phone number in the profile settings and see the error “Phone number is already used. Unlink it from another account to use it in this one” this means the number is linked to another account. In most cases, this is an extra personal profile, created during phone number registration. A phone number in eXpress can only be associated with one profile.

How to Resolve This?

To resolve this issue, you must delete one of the profiles — choose the one with less critical data.

Option	Steps
RTS Option 1. Delete a personal account on the public server	It will delete the personal account’s chat history: Log in as a public user via phone number (skip email input). Delete the account: Settings (avatar above the chat list) > Profile > three dots > Delete Account. Log in to your corporate account without a phone number: use corporate email or server address. Link the freed-up number to your corporate profile: Settings > Profile > three dots > Edit Profile.
Lite CTS eCTS Option 2. Log out of the corporate account	It will delete the corporate account’s chat history: Log in to the corporate account without a phone number: via corporate email or server address. Request a logout: Via the app: Settings > Profile > Corporate Info > Leave the server; Via an administrator: contact your organization’s support team to perform the logout. After the administrator confirms the logout, log in to the corporate account via phone number.

How to Avoid This in the Future?

To avoid number conflicts, use your phone number to log in if it has already been registered — even for a public profile. This preserves chat history.