In Active Directory, computer objects are derived from user objects. Some attributes that are associated with a computer object cannot be restored when you restore a deleted computer object. The attributes can only be restored if the attributes were saved through schema changes before the computer object was originally deleted. Because computer object credentials change every 30 days, the credentials from the backup may not match the credentials that are stored on the actual computer.

If a computer object's userAccountControl attribute was not preserved before the object was deleted, you must reset the object's account after you restore the object.

See Recreating purged ADAM/AD LDS objects