Outlook 2007 and 2010 New Mail Delay

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NeillT

Exchange 2010 SP1 RU1, 2 node CAS NLB, DAG databases spread over 2 mailbox servers. Outlook 2007 and 2010 in online mode.

This afternoon some users have complained of e-mails coming in in batches. i.e. They are working in another app at 16:34, they switch back to Outlook and can visibly see a load of internal e-mails from say 15 minutes before onwards come into the mailbox.

Message tracking shows the CAS getting and apparently delivering the mail at the correct time.

It's as though the async push notification to the client is not working properly or only intermittently.

Anyone seen this before? We will probably reboot the CAS boxes but loathe to do so since some of our older SQL servers don't like losing their mail connection very much.

Thanks

Neill
 
S

Sembee [MVP]

That used to be very common.

It was caused by firewalls or AV blocking the packet from Exchange that tells Outlook something has changed. Doing something in Outlook will also cause Outlook to poll the mailbox. Therefore I would be looking at something like that between Exchange and the users (including the Windows firewall).

Simon.

Simon Butler, Exchange MVP
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