If after setting up Outlook you run into trouble sending or receiving email, the cause could be a licensing issue, a profile problem, the wrong version of Outlook, or a mixture of other issues.
Fortunately, the Microsoft Support and Recovery Assistant can find and help you fix most issues that affect Outlook or Microsoft 365.
Note: The Microsoft Support and Recovery Assistant is not applicable to new Outlook for Windows. Check to see if the new Outlook toggle is turned on or off. If it's on, please go to Troubleshooting Outlook issues.
As a first step, we recommend that you download and run the Support and Recovery Assistant on the affected computer.
Let us fix your issue: Download and run Microsoft Support and Recovery Assistant.
If that doesn't work, contact support for assistance.
For more information about how to store and share files in OneDrive and Teams, see store and share files in OneDrive and Teams.