Desktop or web app user? See Troubleshooting in the desktop and web app.
Want to find out what version you're on? On Windows Phone, tap More . For iOS and Android, tap More > Settings > About.
Microsoft Teams uses single sign-on through Active Directory on your mobile device. That means that there is one sign-in for Teams and your other Office 365 apps and you won't need to re-enter your credentials when you launch Teams or your Office 365 apps from the same device.
If your organization has multi-factor authentication set-up, then there can be an additional step and level of security associated with your sign-in. For example, after you enter your credentials, you might be asked to verify your sign-in via a phone call by providing a unique code, your thumbprint, or a PIN.
If you're having trouble signing in, see Why am I having trouble signing in to Microsoft Teams?
Got a suggestion? We’d love to hear it. Whenever you’re in the iOS or Android mobile app, you can access the Feedback page by going to More > Settings > Send feedback. Alternately, you can report a problem there as well.
On iOS and Android, tap More > Settings >Help. You can select T-Bot or Help articles.
Let your IT admin know if the app keeps crashing. Your admin can work with us to fix the problem.