RE: Question concerning Exchange 2003 and the Global Catalog

  • From: "John Tolmachoff \(Lists\)" <johnlist@xxxxxxxxxxxxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Thu, 2 Oct 2003 14:06:40 -0700

Problem: Exchange on a DC. Exchange will only use that DC. (This is true for
E2K, not sure if it is changed for E2K3.)

Problem: More than one GC in a domain in the same location. While you
experienced the one benefit to having more than one GC per domain/location,
there are a number of downfalls.

Problem: User can not access if no GC available. Windows 2003 Server AD
helps this, that once a user logs on the first time, the other DC will cache
the group credentials, and if during a log on can not contact the GC, will
use the cache. (I think I explained that correctly.)

Did that help, or make it more confusing?

John Tolmachoff MCSE CSSA
eServices For You

> -----Original Message-----
> From: Chad Roush [mailto:croush@xxxxxxxxxxx]
> Sent: Thursday, October 02, 2003 1:54 PM
> To: [ExchangeList]
> Subject: [exchangelist] Question concerning Exchange 2003 and the Global
> Catalog
> I would like some advice, I am wrapping up my Exchange 5.5 to Exchange
> 2003 upgrade at this time.
> Here is my current configuration
> Server1 - W2K DC running DNS, DHCP, Wins currently the operations master
> server GC, PDC emulator, etc.
> Server2 - W2K DC running DNS, WINS, Exchange 2003
> Server3 - W2K server running ISA server
> While moving my mailboxes we had a problem with Server1 and were down
> for a few hours waiting for parts to arrive.
> Since server1 was running the global catalog the users who were moved to
> the Exchange 2003 server were unable to access the new Exchange server.
> Now that we have repaired server1 I want to make sure that one server
> being down does not shut down access to the other servers.  To help
> resolve the Global Catalog issue, I have enabled the global catalog on
> server2 also.
> Now in theory if server1 is down, my Exchange clients should be able to
> fail over to the second GC.
> Am I thinking correctly?  Any other suggestions to help make these
> systems more fault tollerent?
> Thanks,
> Chad
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