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Problem with Mutliple Hub Servers - 14.Mar.2008 3:40:52 PM

maxwebster

Posts: 25
Joined: 13.Feb.2007
Status: offline

Hi,
Current environement
Everyting running on Windows 2003 server Enterprise
2 hub servers
-mailhub1 is also CAS server and has anti-spam agents
-mailhub2 is strictly a hub server right now
2 Exchange 2007 mailbox servers in a single copy cluster connected to SAN
2007 is currently coexisting with exchange 2003 (2 servers in a cluster)
Most mailboxes are still on Exchange 2003
Exchange 2003 is currently the point of entry for external mail, which is then routed to mailhub1 and then goes to recipients with mailboxes on the 2007 mailstore

Here is problem #1
When I make mailhub1 the point of entry for external mail, we receive mail just fine for 07 recipients, but mail destined for users on Exhcange 2003 do not get external mail...messages are bounced back to external senders with a "sender not authenticated" error. I'm assuming it's a permission issue with one of the 2007 connectors, but which permissions, and for which connector (client or default)?

Problem #2
No mail ever seems to go through mailhub2. I noticed this when I was rebooting mailhub1 (windows updates). Internal mail originating from a 2003 user stayed queued on Exchange 2003 until mailhub1 came back up and then was delviered. Is this a routing connector issue? When I run "get-routinggroupconnector" on either mailhub1 or mailhub2, I get the same results on both servers:
Name                      SourceRoutingGroup         TargetRoutingGroup
----                            ------------------         ------------------
MAILHUB1-MAIL             Exchange Routing Group ... First Routing Group
MAIL-MAILHUB1             First Routing Group        Exchange Routing Group

There is no mention of mailhub2 in the results. Is there something I need to add so Exchange 2003 will use mailhub2 if, let's say (and god forbid), I should lose mailhub1?
Thanks in advance for your assistance.

Post #: 1

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RE: Problem with Mutliple Hub Servers - 17.Mar.2008 1:31:03 PM

John Weber

Posts: 1236
Joined: 20.Apr.2005
From: Portland, Oregon
Status: offline

First, I think you should be bringing all mail into the e2k7 hub first, and then routing it to the e2k3. Much cleaner, and gives you one less thing to fix in the end. Fix it now.

Second, mailhub2 needs to be part of the e2k3 routing group - and it sounds like the routing group is not bidirectional.

Have you read this?
http://technet.microsoft.com/en-us/library/bb232209(EXCHG.80).aspx

You can add both e2k7 hubs to the same routing group connector.
You can nuke the existing connector and have a new one up in less than 60 seconds.
You can add the extra hub server after that with little trouble.
Users will never know you did it.

_____________________________

John Weber [Lync MVP] http://tsoorad.blogspot.com

(in reply to maxwebster)

Post #: 2