Initial OWA page slow to display for mailboxes on one Exchange 2007 mailbox server.

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I am wondering if anyone can help me with an issue I am having with slow page displays in OWA. We recently moved all of our mailboxes from a failed CCR cluster over to a stand alone mailbox server. Since the move, users are reporting that it takes a very long time for their mailboxes to open in OWA.

When I do a get-owavirtualdirectory, the output pauses when it gets to the server in question. When I run get-owavirtualdirectory with the -server option for any of the other servers, the output is produce immediately. When I use the same command for the server in question, the ouput is delayed for up to a minute or more at times.

This only seems to be happening with one server. I moved my mailbox over to another server, and OWA responds normally.

Their appears to be no evidence of this issue in the event logs. We have a second identical server setup as a SCR target, and it responds normally.


Kevin Ca

Hello UncleWilly,

Have you noticed any other connection type issues with the server?
If you access OWA directly on the server, do you have the same problem?
If so, what about access the default website?

If you moved the mailboxes to a stand-alone, i'm assuming this machine was a new setup?
What kind of Network cards are installed?

I have seen this slowness issue with OWA before a couple of time; disabling TCP Chimney, RSS, and Large Send Offload V4 did the trick.

Can you review the following documentation as it applies to your environment to see if it helps?

Information about the TCP Chimney Offload, Receive Side Scaling, and Network Direct Memory Access features in Windows Server 2008

948496 An update to turn off default SNP features is available for Windows Server 2003-based and Small Business Server 2003-based computers;EN-US;948496

Using Registry Values to Enable and Disable Task Offloading

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