I have a new employee and trying to give him access to an available key. Under Graphisoft accounts I try to add him as a company member by inviting him using his email. I get an error message saying he is already a member of another company account. He has purged everything he is aware of. What else we do?
I assume that the other company will have to remove that user from their company list.
You should then be able to add them to your company list.
Otherwise that person should still be able to use one of the other companies licenses.
The person who owns the Graphisoft ID can always leave the current company. After signing in, navigate to Company details, there should be a button for "Leave Company"
Then, the Admin of the new company can invite this person to join the new company,
DKO Architecture - HCM
But only if you want to borrow a license from each company.
There is really nothing stopping you from borrowing a license from company 1 and the working on a job from company 2.
Archicad doesn't care where the license comes from.
And you would have to remember to sign out of Archicad and sign in with the appropriate ID each time you swap companies, otherwise it will just continue using the same license anyway.