Veeam and Messages stuck in outbox

[AdrianHinton]

Hi,

Has anyone experienced any messages being stuck in the outbox of Exchange 2010, SP3 RU6 mailboxes at around the same time as Veeam snaps and backs up the Exchange server?

[foggy]

Adrian, do you mean they stuck there temporarily and then go out fine after some short time? Please note that short period of inactivity due to the required stun to commit snapshot data is expected during snapshot removal operations, please see this thread for details.

[AdrianHinton]

Hi,

I am seeing messages being stuck in shared mailbox outboxes and when I look at the "submitted" times, they correlate to times where Veeam was backing up the exchange server. These messages then require an admin to move the mailbox to another DB before some lock is removed thus allowing the admin to move the message. This behavior is seen more with internal messages (from @mydomain to @mydomain) than with external mail, from memory.

Are there any known config items on exchange that are recommended to mitigate this problem?