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Exchange 2010 SP1 intermittent MWI

Unanswered Exchange 2010 SP1 intermittent MWI

  • Tuesday, December 13, 2011 6:43 PM
     
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    We are having a problem with the MWI (Message Waiting Indicator) in Exchange 2010 SP1 UM.  Only a small handful of our 450 Unified Messaging users are getting their MWI messages sent to their sets.  I have turned on logging via

    Get-EventLogLevel "MSexchange Unified Messaging\MWI General" | Set-EventLogLevel -Level:Expert

    But I only see events with ID 1343 like this:

    A Message Waiting Indicator (MWI) notification '1/9 (unread/read)' for mailbox 'Jay K Smith(31c246d4-2582-40d2-b779-e4cea1a9030c)' associated with UM extension '5555153' was succesfully sent to 'EX-UM2'.

    The event is correct and that user does get the MWI lamp lit on his phone, but we know there are other users who do not get notifications sent when they have new messages.

    There are no errors, and I've restarted the Mailbox Agents.

    MWI settings are like so:

    Get-UMMailboxPolicy | select identity, AllowMessageWaitingIndicator |fl

Identity                     : Default Policy
AllowMessageWaitingIndicator : True

Identity                     : Unrestricted Outbound Policy
AllowMessageWaitingIndicator : True


Get-UMIPGateway| FL identity, MessageWaitingIndicatorAllowed

Identity                       : SessionManager1
MessageWaitingIndicatorAllowed : True

Identity                       : SessionManager2
MessageWaitingIndicatorAllowed : True

    It's as if the mailbox agent is not doing its job all the time.

    Any thoughts?