I have been using MSFT Office on my Mac for many years. About six months ago every time I tried to open an Office product it asked me to Activate the file first. I worked with a MSFT rep about a month ago, and he had me delete Office and reinstall. This did not help. Someone suggested that the problem is that Office is not communicating properly with the Mac keychain. (I do not have this problem when using a Windows 10 platform.)



Does anyone know what the keychain should contain, and how to fix same if that is the problem?

The issue is that your Microsoft Office account has not correctly accessing saved activation data in your Mac Keychain. To fix it open Keychain Access, search for Office or Microsoft, and delete those related entries. Then reopen any Office apps and sign in with your Microsoft account to reactivate your account.