Exchange 2010 SP1 “432 4.3.2 STOREDRV.Deliver; recipient thread limit exceeded”

By |2017-12-07T09:48:55+00:00December 1st, 2011|Exchange|0 Comments

We experienced an issue recent in a Exchange 2010 environment where all public folder replications messages were stuck in the queue on one of our Exchange boxes with the following error “432 4.3.2 STOREDRV.Deliver; recipient thread limit exceeded”.

After looking into this for a while i came across the following article “” which explains the reasons why the following problems occurring since the changes in Exchange 2010 Sp1.

To Resolve the issue we added the following text to the edgetransport.exe.config file.

<add key="RecipientThreadLimit" value="2" />
<add key="MaxMailboxDeliveryPerMdbConnections" value="3" />

After adding the key and restarting the Hub Transport service to apply the setting all queues emptied and messages got sent Smile

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