Local admin user account password not working to disjoin Azure domain

That password didn't work.  Check it and try again

Trying to disjoin from an Azure domain and getting this error? 

In this case the users COULD logon to the pc using a local user/password, but if they tried to disjoin from the 365 domain, the system would ask for alternate account creds and fail everytime.

We deleted the user from admin center in the source tenant. 

This removed the users machine from the 365, did not delete any data for us although you might want ti to test in your own situation.

Once removed, the user bypassed the above stop, as the machine is un-enrolled immedately.  They could logon with the local user password and add themselves to the new domain.