I use a GlobalProtect VPN and have been having an issue logging in recently. The GlobalProtect VPN normally would prompt me with an Office 365 page to specify which account I want to login with but that no longer appears and will automatically use my windows account. I am getting the error message that states "The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account". I have tried just about everything I can think of to resolve this and even tried on a different computer and get the same error. I have uninstalled it completely cleaning the leftover folders and registry items, reinstalled it with the single sign-on switch set to off, cleared my credential manager, cleared my internet cache, imported the program files of a known working machine, and imported the registry entries from a known working machine. The only thing these two machines have in common is that I have signed into office with the same account. Any help is appreciated!
Have you tried logging out of other MS accounts?
Go to Start, type "Email and accounts" click on an active account -> manage and then sign out.
After that try signing in to GlobalProtect VPN.
I encountered the same issue for a couple of users, but I can not figure out the randomness of this problem occurring..
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