Office mail merges are extremely slow after upgrade to Exchange 2013
Ever since we migrated from Exchange 2007 to 2013 SP1, our employees have reported that mail merges are taking triple the amount of time to send messages. What used to take an hour is now 3 to 4 hours. Some offices are required to send upwards of 6,000 messages at a time. I know Exchange 2013 handles throttling differently than previous versions however the default (global) ThrottlingPolicy was sufficient with our previous 2007 installation. I've never had to deal much with Throttling so I'm not exactly sure of what settings I should be looking at....also I'm not sure if this would even be related to throttling. Has anyone experienced this issue before with Exchange 2013 and could you provide any recommendations or settings that I need to be focusing on in relation to Outlook client connections? We are currently using the GlobalThottlingPolicy for all users.
April 16th, 2015 11:36am

Hi,

Whats the version of Office?

The following Outlook client versions are fully supported by Exchange server 2013.

I suggest to upgrade one office client to Outlook 2013 (with word 2013) to check this issue.

Best Regards.

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April 17th, 2015 4:49am

Thank you for the assistance. Most of our users are running Office 2010. I will upgrade one of our mail merge users to Office 2013 to see if it helps with the slowness.
April 17th, 2015 3:23pm

I finally had a chance to upgrade one of our client machines to Office 2013 and ran a mail merge of about 2,000 recipients. It took about 2 hours to complete. Even though this isn't too bad unfortunately some of our users send upwards of 4,000 to 7,000 emails in one merge. With Exchange 2007 it took about half the time to send a mail merge. I'm thinking it must have something to do with how Outlook clients connect to Exchange 2013 and/or the throttling/quality of service features added to 2013.
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May 12th, 2015 3:39pm

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