Enable two-factor authentication via Clickatell.
The Clickatell service allows ONLYOFFICE users to secure the access to the web office with two-factor authentication and prevent any unauthorized access. When you access your ONLYOFFICE account for the first time after enabling the two-factor authentication, you will need to perform one more step: Specify the phone number you wish the SMS to be sent at. ONLYOFFICE offers the possibility to remember that a particular browser was already successfully used for the two-factor authentication. So when you access your ONLYOFFICE account for the second time using the same browser, it will ask you for your email and password only. But if you or someone else try to access your account from any other computer or browser, the verification code will be required. So your account will still be protected.
To sign in, users will need to enter the code received via the SMS.
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