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Lost outlook connectivity to Exchange CMS

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Lost outlook connectivity to Exchange CMS - 21.Sep.2009 11:20:02 AM

jackbrasher

Posts: 9
Joined: 27.Apr.2009
Status: offline

Geographically dispersed CCR cluster, Exchange CMS called CMS001.
There are 2 DCs in the Exchange Site, 1 in each physical location. The Primary is a Server 2008 DC, the Secondary is a 2003 DC. The Forest is 2003.
.
Primary site DC is specified as 1st DNS server on all servers.
NO clients use Exchange DCs for DNS resolution.
.
Problem:
The Secondary DNS server became unavailable for a few minutes. My users began complaining the their Outlook was Locking Up. Checked the DC, which I had unplugged from the network. Plugged it back in and the problem was resolved.
.
Can someone explain what happened?

Post #: 1

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RE: Lost outlook connectivity to Exchange CMS - 21.Sep.2009 11:23:41 AM

mark@mvps.org

Posts: 6811
Joined: 9.Jun.2004
From: Philadelphia PA
Status: offline

How many GC's have you got?

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Mark Arnold (Exchange MVP)
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(in reply to jackbrasher)

Post #: 2

RE: Lost outlook connectivity to Exchange CMS - 21.Sep.2009 11:25:34 AM

jackbrasher

Posts: 9
Joined: 27.Apr.2009
Status: offline

We have 6 remote locations, each of which has at least 1 DC that is a GC (not counting the Exchange Site). Each physical location is a unique AD Site.

(in reply to mark@mvps.org)

Post #: 3

RE: Lost outlook connectivity to Exchange CMS - 21.Sep.2009 11:33:09 AM

mark@mvps.org

Posts: 6811
Joined: 9.Jun.2004
From: Philadelphia PA
Status: offline

So the affected site was down to zero GCs available?

What's your question then?

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Mark Arnold (Exchange MVP)
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(in reply to jackbrasher)

Post #: 4

RE: Lost outlook connectivity to Exchange CMS - 21.Sep.2009 11:37:38 AM

jackbrasher

Posts: 9
Joined: 27.Apr.2009
Status: offline

Not what I said. Said that each site has AT LEAST 1 GC.
.
The sites in question:
Site 1 - 2 DCs, both are GC.
Site 2 - 1 DC which is a GC.

Neither of these were off-line (essentially, ALL dc's are gc's)

The Secondary DC in the Exchange Site was off-line.

(in reply to mark@mvps.org)

Post #: 5

RE: Lost outlook connectivity to Exchange CMS - 21.Sep.2009 11:45:18 AM

jackbrasher

Posts: 9
Joined: 27.Apr.2009
Status: offline

Additional Information:
Event Log Warning:
Source: MsExchangeMailSubmission
EventID: 1009
.
the MS Exchange Mail Submission Service is currently unable to contact any Hub Transport servers in the local Active Diretory Site. The servers may be too busy to accept new connections at this time.
.
Structure of network:
Generating server in in Exchange AD Site, which has a 2008 DC, Physical Location 1.
DC I took offline is in Exchange AD Site, which has a 2003 DC, Physical Location 2.
.
cluster CMS is currently owned by server in Physical Location 1.

(in reply to jackbrasher)

Post #: 6

RE: Lost outlook connectivity to Exchange CMS - 21.Sep.2009 12:02:53 PM

mark@mvps.org

Posts: 6811
Joined: 9.Jun.2004
From: Philadelphia PA
Status: offline

Still not sure what your Exchange question is. You had an infrastructure failure in that the box your Exchange server needed to talk to was not there. If you had another box doing the same job you would have had a glitch as Exchange looked around for the next available server in its list. The clients have the same issue.

_____________________________

Mark Arnold (Exchange MVP)
List Moderator

(in reply to jackbrasher)

Post #: 7

RE: Lost outlook connectivity to Exchange CMS - 21.Sep.2009 12:06:34 PM

jackbrasher

Posts: 9
Joined: 27.Apr.2009
Status: offline

The DC that was taken off-line was the SECONDARY, not the primary. Exchange should not have even been using that DC at that time. There should not have been an infrastructure failure at all?

(in reply to mark@mvps.org)

Post #: 8

RE: Lost outlook connectivity to Exchange CMS - 25.Sep.2009 8:23:21 AM