all PC's unable to login after restore AD backup

Hi Expert
i have win server 2003 AD
after critical error i restore old backup 3 months ago
after that all PC's unable to login the error message "the domain not available"
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Luis MouraCommented:

Did you try in one machine, remove from domain and add again!?
Larry Struckmeyer MVPCommented:
May not be necessary to disjoin/rejoin.

the most efficient is the one using ADUC and "reset account"

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MASWORLDAuthor Commented:
thanks all
rejoin domain work but i have more than 50 PC's
i search for another way
i still have access to the current AD state can i copy a file to the old backup or some thing like that
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David Johnson, CD, MVPOwnerCommented:
have you tried larry's suggestion, reset account from Active Directory Users and Computers? How many users may have changed their password in the last 90 days? Machine passwords change automatically
MASWORLDAuthor Commented:
no passwords changed from year a go
and the backup from 3 month's
Larry Struckmeyer MVPCommented:
the users passwords have not changed but the machine ones change themselves every 90 days so a old backup will require the machine password be reset.  Hence the link I gave you.
Luis MouraCommented:
You can select all computer accounts on AD, and try disable/enable account.
See if it's works with one test computer.
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