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MorrisonCohen

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Exchange 2010 Performance issue

When someone sends an email out to everyone in our firm via a distribution list of about 225 people, we notice the outlook bubble Outlook trying to retrieve data from the exchange server.... pauses for about 5 seconds and goes back to normal.  This happens most days but not every day.    trying to put the pieces together. Any help would be appreciated.

Exchange 2010 with two mailbox servers running on one mailbox server \other is passive node, with two cas servers.
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Will Szymkowski
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Are your outlook clients using cached Exchange mode or online mode? Also does this happen when the sender has attachments or not? When this happens check the performance of The Exchange server holding the HUB Transport role.

Will.
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MorrisonCohen

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We are in online mode - checked the hub sever and didn't see any problems?
Does this happen all the time? Does the user send it out with attachments? Have you checked your resources on the mailbox server? Does this happen to all users?

Online mode uses Exchange server resources so if you have EVERYONE using online mode it is using constant NETWORK and Exchange Resources which can give you this message that you are receiving. I bet if you switched to cached mode on someone mailbox this would not happen as cached mode uses local machine resources for searching etc, and periodically makes connections to the Exchange server.

Will.
Happens most of the time but not all the time - no attachments just a simple test email will cause it.  Cache mode is not an option as it conflicts with applications we have.    I checked all servers and so not see anything server side.   That's why I am looking at white space but I guess that has nothing to do with it.
Any other solutions?
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Will Szymkowski
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