All Active Directory users' passwords doesn't work, and no Local SD Admin. what I should do.

All Active Directory users' passwords doesn't work, and no Local SD Admin. what I should do.

All Active Directory users' passwords doesn't work, and no Local SD Admin. what I should do.
The only SD Admin is a technician imported from AD and now all users from AD cannot login. the Issue message that the password is not working. 

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