Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear Chris,
If it is convenient, could you upload some screenshots showing the error message in your environment for our reference?
Meanwhile, please open an Office application and upload a full screenshot of the Account page for our confirmation. You can access teh page via clicking on File>Account.
Note: Remove any private information before uploading the screenshots.
per your description, the issue happens in Outlook, may I know whether other Office applications have such issues?
Thank you for your effort and time.
Sincerely
Cliff | Microsoft Community Moderator