When working offline Windows 7 Pro machines will occasionally receive the error "there are currently no logon servers available to service the logon request"

By default Windows 7 login is in the format user@domain

Have the user switch user , select other user and them login as domain\user

This worked for me   

You cannot reset the password , or atleast I do not know how. This solution makes Windows forget the server , & thereby allows you to reenter the credentials

The solution requires you to edit the registry. Proceed at your own risk.

Navigate to

HKEY_CURRENT_USER\Software\Microsoft\FTP\Accounts

Expand Accounts.

Delete the key for the server in question.