Common Outlook Errors - Outlook Desktop App

Sometimes, small issues can cause Outlook to throw an error. Please refer to this article for common fixes.

Unable to connect to Email

If you are unable to connect or are prompted for your password repeatedly attempt the following options. After finishing one step, if it does not resolve the issue move on to the next.

Too many recipients in Outlook?

  • The maximum number of recipients for an individual email through UNH IT mail servers is 300. If you try to send to more than 300 recipients in a single send, you will get an error similar to "This message wasn't delivered to anyone because there are too many recipients. The limit is 300."

Pop up with Error Message:

Microsoft Exchange Administrator has made a change that requires you to restart Outlook.

  • Simply quit and restart Outlook, this message should disappear.

The file you're attaching is bigger than the server allows.

  • The max file attachment size for UNH emails is 35 MB. If you need to send a file larger than that, use a file sharing option like Box.


Article ID: 642
Fri 7/19/19 5:30 PM
Fri 2/19/21 11:16 AM