Corporate Email

Authentication scheme using a corporate email address. Login without a phone number. Requires an existing corporate account and configured or simplified authentication (suggests).

Can I Switch From Phone Number Login to Email Login?

⚠️ If you previously logged in with a phone number, use the Phone and credentials button or connect to the corporate server in the profile settings (eXpress). Otherwise, when you link a new number, another account will be created, and your chat history may be lost.

What Happens After Entering Corporate Email?

Then, depending on server settings, you may need to:

• select a server (check with your organization's support team),
• enter credentials,
• confirm login with a code from the email,
• or manually enter the server address.

Explanation for Administrators

If simplified authentication is configured, at this step

RTS

or

ETS

searches for domains associated with the email.

• If the server is found and the user exists — proceed to the next step.
• If not configured — "Corporate email not found" error.

What Does the “Leave the Server” Button Do?

When you sign in again, the Leave the server button sends a logout request from the corporate server. The same device will be required to log in again.

Why Was SMS Verification Still Required?

The system found a mobile phone number associated with the profile.

The SMS code is not requested when:

• You are a user of the public
  RTS
  server and connect to a corporate
  CTS
  server via Settings > Profile in the eXpress app.
• Your corporate server administrator has disabled SMS confirmation when signing in with email or server address for the internal corporate network, and you are connecting from it.