- Check your email settings
Verify that the email account you are attempting to synchronize with the Outlook app is properly set up on the server side.
- Use a supported version of Outlook
Check to make sure the version of Outlook you are using is compatible with the server you’re attempting to synchronize with.
- Re-enter your email address and password
If the email account details have changed, re-enter the latest information within Outlook to ensure synchronization.
- Verify account authentication
Check to make sure that two-factor authentication or confirmation via a mobile device is not required as part of the setup process.
- Generate an app password
Create an application-specific password as part of the setup process if the server requires an additional layer of authentication.