8/2/2023 0 Comments Outlook throttled message"Maximum Allowed Sessions Per User"=dword:00000080Īfter changing the Limit, you must restart the Exchange Information Store service. So it will take many days to send 1000 emails. Get-mailbox -name | set-mailbox -ThrottlingPolicy "New Throttling"Ī new registry key to raise the MAPI objects limit and the maximum allowed sessions per user: Windows Registry Editor Version 5.00 DaniFC if you use the Send an email notification (V3) action it can only send 100 emails in any 24 hour period. In Exchange Powershell, create a new throttling policy and apply it to all affected mailboxes: New-ThrottlingPolicy -Name "New Throttling" -RCAMAXConcurrency Unlimited Be aware that setting throttling to unlimited is typically not a good idea, but in this small environment it is okay. These two things fixes the problems of my customer. > Unable to open message store.Īdditionally, the user runs into the MAPI limits due to the high access rate and the Exchange server begins to throttle down the connections. MoMTException:1246 (rop 1246) -> ĭas Postfach /o=First Organization/ou=Exchange Administrative Group (XXXXXXXXXXXXXXXXXX)/cn=Recipients/cn=xxxxxxxxxxxxxxxxxxx-Customer That is logged in „C:\Program Files\Microsoft\Exchange Server\V15\Logging\MapiHttp\Mailbox“ logs. The issue is caused because the user reaches the MAPI object and session limit of Exchange 2016. He found the issue which was causing the problem ? Additionally, you see some garbage (random ASCII) in the mailbox name.īig thanks to my collegue Wolle who is a geat Microsoft engineer. If you look in the connection Details, you will see many connections to the different boxes and one or two lines where the VID/CID counts up really fast and changes the state between success and failure. Outlook begins to stall while trying to access the mailboxes during startup of Outlook. Some of the users have a big folder structure in the mailbox. The customer has in total 20 mailboxes and all coworkers (5) in most cases have full access to each other. He has an Exchange 2016 CU8 with Windows 10 Clients and Outlook 2016 Build 8829 click-to-run. I had a huge problem at one of my clients.
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