Digging further into the Communicator log, I found these entries. It looks like the Communicator client is attempting to download the address book from the correct place, but the download is failing. I haven't been able to find out anything about this 0x80000008
error in searching though.
03/25/2011|07:54:02.723 1ED7:A0813540 WARN :: GalInitializeWithInBandUrl: before GalInitialize. useFallback=3, useInband=1, insiderUser=1, sip=jdoe@company.com, user=jdoe@company.com, url_server=https://InternalServerFQDN/Abs/Int/Handler, url_local=
03/25/2011|07:54:02.724 1ED7:A0813540 INFO :: GalpReadSettings: 1. GAL file URL: https://InternalServerFQDN/Abs/Int/Handler.
03/25/2011|07:54:02.725 1ED7:A0813540 INFO :: GetGalSequenceNumber: Full DB sequence = 0, Delta DB sequence = 0
03/25/2011|07:54:02.726 1ED7:A0813540 INFO :: GalpSetSyncStatus: GalpSetSyncStatus setting SyncStatus = 0
03/25/2011|07:54:02.731 1ED7:B10E2000 INFO :: GalpThreadProc: Next sync in 0 ms.
03/25/2011|07:54:02.731 1ED7:B10E2000 INFO :: GalpSynchronize: GalpSynchronize() entered, Today=0e97
03/25/2011|07:54:02.732 1ED7:A0813540 INFO :: OnEvent: eventType=1, dataSource=5
03/25/2011|07:54:02.732 1ED7:B10E2000 INFO :: GalpSynchronize: GalpSynchronize() The current sequence number is 0000. 03/25/2011|07:54:02.733 1ED7:B10E2000 INFO :: GetGalSequenceNumber: Full DB sequence = 0, Delta DB sequence = 0
03/25/2011|07:54:02.734 1ED7:B10E2000 INFO :: GalpReadFullFile: Loading full file https://InternalServerFQDN/Abs/Int/Handler/F-0e97.lsabs.
03/25/2011|07:54:02.735 1ED7:B10E2000 INFO :: GalpDownload: GalpDownload()entered, with Url=https://InternalServerFQDN/Abs/Int/Handler/F-0e97.lsabs
03/25/2011|07:54:04.240 1ED7:B10E2000 INFO :: GalpDownload: hr= 0x80000008 03/25/2011|07:54:04.241 1ED7:B10E2000 ERROR :: GalpReadFullFile: Error: returning hr = 80000008 -
03/25/2011|07:54:04.241 1ED7:B10E2000 WARN :: GalpSynchronize: GalpSynchronize(), Full sync failed: 0x80000008.
03/25/2011|07:54:04.242 1ED7:B10E2000 INFO :: GalpSetSyncStatus: GalpSetSyncStatus setting SyncStatus = 11
03/25/2011|07:54:04.242 1ED7:B10E2000 INFO :: GalpThreadProc: Gal synchronization : 0x80000008