Can join machines to domain, but not login

Out of the blue, I'm unable to log new machines into the domain.  I can join machines to domain, but when I try to log into the domain on them, I get the error "Account Not Found!"

I see the machines have been joined under the computers group when I look in AD, so they are being added.

Disjoining them, renaming and rejoining has no effect.

Know what is up?
Marketing_InsistsAsked:
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Mike KlineConnect With a Mentor Commented:
So this happens on every machine?  Check the logs on the domain controllers and check the logs on the machines netsetup.log

More info here   http://technet.microsoft.com/en-us/library/cc961817.aspx

Did anything change that you know of because you said "out of the blue"

Thanks

Mike
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khairilConnect With a Mentor Commented:
Hi,

Are this new computer? Are you cloning disk from master copy - like using ghost or something like that?

When computer cloned they have same SID and this will introduce error when computer attached to domain and user try to logon. You have to do sysprep prior cloning the image.

Try sysprep that affected computer first, just to know if it is the problem, here is how to do sysprep,:
1. For XP, http://support.microsoft.com/kb/302577
2. For 7, http://technet.microsoft.com/en-us/windows/ee530017

Good luck.
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Marketing_InsistsAuthor Commented:
Hi, to rule out duplicate SIDs, I did sysprep one and tried newsid (sysinternals) on another - same thing.  Systems are XP
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Marketing_InsistsAuthor Commented:
resolved: and here it is.

For whatever reason, logging in on XP machines using domain\userName  in the user name field was resulting in the error.

When I used my userName in the name filed, then chose the domain from the drop down, it worked.

Perhaps a recent change to the DCs after a recent patching?, but very strange.

Thanks for the help!
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Mike KlineCommented:
yeah that won't work  domain\username

you can also use the UPN to login   username@upnsuffix
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