Cant delete ABM account

Recently i created an ABM account and seemed to work fine. all of the sudden we cannot log in anymore and we get a notification that this apple ID is deactivated (but it is active). when i want to reset password, deactivate or delete this user in ABM, i get an INTERNAL_ERROR message with no further explination. i can delete and deactivate other users but not this one. The log file is not realy any use since it sais 'SUB_STATUS, COMLETED_WITH_FAILURE".

Any idea how i can resolve this?

Cant delete ABM account
 
 
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