Office 365 Outlook Activation Issue
This one is extremely frustrating. Why Microsoft doesn't have some sort of menu accessible option to deactivate/sign-out a user with Office 365 on Macs I will never understand. I've been encountering the message " Another account from the same organization is already signed in." when attempting to activate an Office 365 Outlook installation. I finally found the fix for it on the 365 forums , but wanted to re-state here as well as highlight the importance of removing OneNote license data. To fix this issue, you must delete ALL of the activation and certificate items associated with Office/Outlook/OneNote: 1. Quit all Microsoft applications. 2. Open Library folder of current user (\Users\<Username>\Library) 3. Delete following files from Users\<Username>\Library\Containers com.microsoft.Office365ServiceV2 com.microsoft.onenote.mac com.microsoft.outlook 4. Delete following files from Users\<Username>\Library\Group Containers *.ms *.Office *.OfficeOsWeb