Random users suddenly encounter login issue

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  Recently, my users randomly encounter login issue, "Windows cannot connect to the domain, either because the domain controller is dwn or otherwise unavailable, or because your computer account was not found. Please try again later. If this message continues to appear, contact your system administrator for assistance" or "The system cannot log you on to this domain because the system's computer account in its primary domain is missing or the password on that account is incorrect."
  
  I have verified that the computer object is available. Did a reset but still does not work. What I can find so far is to unjoin and rejoin the machine to the domain.
  I have more than 200 users thus it will be quite difficult to accomplish.
  
  I have multiple domains, namely, sg.com and my.local with 4 DCs in total, 3 in sg.com and 1 in my.local.
  I was told that replication was done on the DCs in sg.com domain and not to the DC on my.local domain, only a trust was created between sg.com and my.local domain.
  
  From what I found out replication was done till May 2008 from sg.com to my.local but my predecessor says no replication was done.
  
  I am now encountering some new issue with accounts not replicated to my.local domain. They seems to be unable to login to the sg.com domain. 
  
  I have checked that the PDC is pointing to a DC in sg.com domain and have created sites to force users to authenticate to the nearest domain. But it seems some machines are using the DC in my.local to authenticate. And when I do a Net time, it points to the DC in my.local as well. 
  
  How can I force the users and the domain time to point to my DC in sg.com.....
  Appreciate any help, thanks a million really lost.
  
  Btw.... will this issue cause exchange 2000 client to lost connectivity and reprompted for login? 

  Sunday, December 21, 2008 1:33 PM