Dear Microsoft Community,
I have an issue and am in dear need of help:
Exchange 2013 CU11
Sent Mails get stuck in Drafts folder when sent from OWA
In Outlook they go to the Sent Mail folder but do not reach the Queue.
Only Users from Particular Databases at random times apparently are affected and only sporadically and for short periods of time (1-2 hours) after which everything stars working fine again.
If I move a Mailbox to one of the affected Databases the user starts exhibiting the Issue. Also if I move Mailbox to a database without problems the issue stops.
All databases are affected at random unrelated to the server they are on. There is one server where the Issue occurs more often than on the others.
It matters not if Mails are sent to external or internal addresses.
Only outgoing mails affected Incoming works fine.
Issue appeared immediately after an unexpected restart of the servers related to a storage outage.
I have correlated the issue with an Event:
Does anyone know what the MailSubmissionWatermarksProbe is about?
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Log Name: Microsoft-Exchange-ManagedAvailability/Monitoring
Source: Microsoft-Exchange-ManagedAvailability
Date: 4/20/2016 3:52:12 PM
Event ID: 4
Task Category: Monitoring
Level: Error
Keywords:
User: SYSTEM
Computer: S1EX2k13
Description:
Watermarks for one or more database(s) have been below the age threshold of 01:00:00 for last 02:00:00.
Last Reported Database: Database1
Last Event Counter: 378203086 : 4/20/2016 1:39:33 PM
Watermark(s): MailboxTransportSubmissionAssistant : 377652258 : 4/20/2016 7:58:03 AM
Exception: Watermarks are behind for database 'Database1'
Diagnostic Command: Invoke-MonitoringProbe -Identity 'EventAssistants\MailSubmissionWatermarksProbe\Database1' -Server S1EX2k13
Command to get all unhealthy watermarks monitors: Get-ServerHealth -Identity 'S1EX2k13' -HealthSet 'EventAssistants' | ?{$_.Name -match 'MailSubmissionWatermarksMonitor' -and $_.AlertValue -ne 'Healthy'}
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Also the submission service restarts about once or twice per hour on all servers.
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Event ID: 7031
Computer: S1EX2k13
Description:
The Microsoft Exchange Mailbox Transport Submission service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 5000 milliseconds: Restart the service.
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DNS is fine and configured correctly.
There is no Backpreasure.
There is enough space.
No performance issues.
I've been unable to corelate any other Event to the issue.
LG,
Alex D