When MFA is enabled for a user and MFA type is Call,
After login, call will be made to the user's phone number / extension. User has to answer the call and press # verify their authentication
The user can request the call again every 60 seconds and gets 3 login attempts. If the user exceeds maximum attempts they can refresh the browser and try again
Trust Device Checkbox
When the user selects the "Trust this device for 7 days" checkbox, after validating OTP user will not be prompted to verify their identity via call for the next 7 days
If user can't get codes by text, call, or Google Authenticator, they can use backup codes to sign in to PBX. Once the user uses a backup code to sign in, that code becomes inactive. Userman users can generate/ regenerate / delete / download backup codes from UCP Settings.