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Registration & Authentication in the App
Updated 21 Oct 2026

Registration & Authentication in the App

General Questions

How to Register in the App?

To use the app, you need to install it, register, and log in using your perconal credentials.

Instructions are available in the step-by-step registration guide.

After registration, you can log in to the app again from an unlimited number of computers and mobile devices.

For Administrators: How User Registration Works
  1. First, a personal account is created on
    RTS
    (eXpress) and/or on
    ETS
    (branded ETS app). For a personal account, HUID (the user ID in the system) and encryption keys are generated. The keys can additionally be protected with a personal password in the app settings.
  2. Next, the user can remain on
    RTS
    and become a public user. This is only possible in eXpress and only by phone number. The second way is to link a personal account to a corporate account on
    CTS
    /
    eCTS
    and become a corporate user. This is required in an
    ETS
    app and in eXpress Corporate.
Corporate user authentication is supported through various methods — more details.

Where to Get an Account?

Version How to get
Public Register for eXpress using your phone number.
Corporate If your organization has purchased a corporate license, contact your organization's support team to get a corporate account, access , and instructions. They can also provide your work email, login, password, domain, and confirm whether an account exists on the server.

App Log In Options

If more than one login method is available on your server, the first screen has a hint Which login method to choose?. In mobile apps, it opens by tapping, and in the web app, by the arrow next to the heading. The hint lists only the methods enabled by the administrator.

You can register and sign in to the app in several ways. Your administrator can disable some of them:

Method Description
Quick corporate login
eCTS
  • Available only in branded
    ETS
    apps where this button was added during the build. On the first screen, it appears above the other login methods.
  • The app automatically finds your organization's corporate server. You may need to enter your credentials and the code from the SMS.
  • Not available for public users.
  • If the message “This login method is currently unavailable. Please contact your server's admin” appears, contact your organization's support.
QR code
(Quick sign-in)
RTS
Lite
CTS
eCTS
  • If you are already logged in to the app on another device, you can log in on the current one using a QR code.
  • Available to public users.
  • Can be used for the eXpress
    Lite
    re-login.
Phone and credentials
(mobile phone number field)
RTS
Lite
CTS
eCTS
  • You can become a public user with limited functionality or become a corporate user. In the branded
    ETS
    app, logging into a corporate account is mandatory.
  • Can be used for the eXpress
    Lite
    login.
  • Re-login on other devices is possible via phone number or QR code.
⚠️ Register this way. A phone number additionally protects the account and preserves correspondence when credentials change. It can be added later, but only if it is not linked to another account.
Corporate email
CTS
eCTS
  • Requires a pre-configured corporate account and setup of simplified authentication.
  • Not available for public users.
  • You can sign in again using the server address or a QR code. Via email, if simplified authentication is configured.
Corporate server address
CTS
eCTS
  • Requires a pre-configured corporate account.
  • Not available for public users.
  • Cannot be used for the eXpress
    Lite
    login.
  • You can sign in again using the server address or a QR code. Via corporate email, under the same conditions as in the “Corporate email” method.

How Do I Register Without an Email or Server Address?

If you plan to use eXpress for personal purposes, use your phone number to log in to the free public version.

What Information Do I Need to Connect to a Corporate Server?

If your organization uses the corporate version of eXpress or a branded app, your organization's server administrator provides the sign-in steps and credentials. Contact them or your organization's support team.

Why Do I Need to Enter Anything? I’m Already Signed In on My Work Computer

Single sign-on is possible only if your organization uses an
ETS
app. It is not available in eXpress. Check this with your organization's support.
For Administrators: How to Configure SSO on User PCs?
ETS
 For
ETS
apps (Web/Desktop 3.67 and above, Backend 3.65 and above), you can configure sign-in via the Kerberos protocol. Then users from Active Directory do not need to manually enter data to connect to the corporate server — more details.

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