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Troubleshooting Address Book Lookup or Check name Failures

 

Typically this error will resemble something like “The name could not be resolved. The name could not be matched to a name in the address list.”

  • Determine if the client is connecting to a GC or CAS in one of two ways: hold the Ctrl Key then “right click” the Outlook Icon on the Task Bar and choose Connection Status; and/or look at the Type Directory and look at the server Name.
  • Capture a trace from the client to see which GC/CAS we are trying to connect to. 
  • If it is a GC, several things on the GC should be checked using DCDiag, NetDiag.
  • If it is a CAS, RPCDump can also show if F5CC (NT Directory NSPI) is listening
  • Also Verify the user is showing in the GAL and not hidden.
  • Verify Kerberos is working.

Praveen Kumar

MCTS | Exchange Server


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