Windows server 2008 r2, network issues after update

We have a Windows Server 2008 r2, yestreday it updated and re-started. Now network users cannot re-connect to network drives until they are re-entered their username and password. This they have to do this each time they log back in. Why?
aic0001Asked:
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FemSteenkampIT managerCommented:
I presume the windows 2008 box is part of a domain?

I would verify the domain membership of the computer account, and potentailly unjoin and rejoin it to the domain. (use tools like NETDO VERIFY)
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aic0001Author Commented:
The AD does not see the Domain. This server is the only one in use so it cannot see iteself. Is it OK to do the NETDO VERIFY and rejoin?
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aic0001Author Commented:
It seems that AD has failed, "there are no logon servers available", any idea why this has happened after the updates and how can we fix it?
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FemSteenkampIT managerCommented:
this typically means that the DNS for teh server is misconfigured, and cant locate a domain controller

make sure the DNS configuration of teh server is still correct ( should be pointing to the Active directory DNS zone)

so the machine itself the windows2008 machine is the domain controller?? on which file shares are there as well or where is the domain controller.
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aic0001Author Commented:
This is the PDC, all file shares are on the main Drive. Nothing unuslaul expect this all occured after updates.
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FemSteenkampIT managerCommented:
make sure that the machine points to itself as dns server. restart the netlogon service after you make the cahanges ( not user affecting since restart of netlogon service takes seconds

  ( or where are your domain dns hosted)
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aic0001Author Commented:
All checks run indicated a problem with netlogon

As suggested I re-started this and that seem to have fixed it. Thanks
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aic0001Author Commented:
All seems to work now, exchange and AD.
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aic0001Author Commented:
Netlogon re-start but with no answer as to why it was stopped despite several re-starts.
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Windows Server 2008

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