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Connectivity issues with Outlook 2007 to Exchange 2003 over WAN

Posted on 2011-03-10
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Last Modified: 2012-05-11
We have a remote office that connects via LAN to LAN VPN to our main hq where our E-mail Server resides. The remote location has a 2008 Domain Controller. Our HQ has both a 2008 and 2003 DC. Our Exchange server is  2003 on Windows Server 2003. We have one particular client that keeps receiving Outlook pop-ups through out the day saying that connectivity to the Exchange server was lost and will be restored. These pop-ups are logged in the Application Event View as Event ID 25. This workstation also has been logging MrxSmb Event ID 3019 warnings in the System Event View.
Any ideas on how to resolve this would be greatly appreciated.
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Question by:CCHouston
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by:chuckyh
ID: 35097956
Are you using RPC over HTTPS? or a straight exchange connection over WAN? I would recommend RPC over HTTPS for remote users like that.
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by:Roachy1979
ID: 35098365
Agree with chuckyh - you really only want to be using Outlook -> Exchange over a stable, fast connection unless you're using RPC/HTTPS....
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by:Auric1983
ID: 35098443
Another thing you could try, is setting up the remote clients to run in cached mode, the initial change takes some time as it stores a local copy of the mailbox, but it alleviates a lot of network pressure.

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by:Auric1983
ID: 35098447
You also may want to consider giving remote users a lower mailbox size limit
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by:CCHouston
ID: 35099704
We're not using HTTP over RPC. The connection is a stable connection. Both sites are on a full T1. My experience with HTTP or RPC are for slow WAN connections which this is not the case. It only seems to be effecting one workstation out of 20 at the remote site.
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by:Auric1983
ID: 35099777

CCHouston,

Are the clients connected in "Online" mode or running in cached mode?

I found with my remote sites, which are connected via single T1 MPLS connection to our network, I needed to have my clients run in cached mode.  It stores a local copy of the mailbox so it is only transferring the changes at any given time rather than trying to open the mailbox "online"

A single T1, for 20 users not to mention any other network overhead really is not a lot of bandwidth to play with.  
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CCHouston earned 0 total points
ID: 35100157
I did put it in cached mode. Outlook never established a connection with the Exchange server after that. However after asking the user a few more questions we found out that there was a power outage at the remote site. We did a system restore point to a date previous of the power outage and this did the trick. It's always good to drill the users.
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by:Qlemo
ID: 35349328
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
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