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For those who are having trouble editing documents in Microsoft 365 on a Mac (Shows up as Read Only).
Close all Microsoft 365 Applications then press the Command Key + Space Bar to pull up Spotlight Search and Type "Keychain" then select Keychain Access:
Once Keychain Access is open look for the Search field on the Top-Right of the screen and type in "Microsoft"
Delete every key that comes up containing Microsoft, then exit Keychain Access.
Open Microsoft Word. If you are still logged in at the Top Left, then Log Out. Close & Reopen Word, then Sign in with your ULID@louisiana.edu and password:
Once signed in you should have full access to edit your documents. If you still can't edit documents then you need to Uninstall Office then go to the Microsoft 365 Portal and download & install office to make sure you are using the correct version.
If doing that does not resolve your issue, please follow the instructions found on Microsoft's support page: How to remove Office license files on a Mac - Microsoft Support