Event ID - 9096

Event Id9096
SourceMSExchangeSA
DescriptionThe MAD Monitoring thread is initialized.
Event InformationThis is an informational event proceeded by an event id of 9095 from the same source. This event shows that the initialization of WMI has been successfully completed. 

Refer follwoing MS articles for more information about this event.
Reference LinksUsers may receive a "503 Service Unavailable" error message in Exchange Server 2003 when they try to use a Web browser to gain access to OWA

How to Troubleshoot the "503 Service Unavailable" Error Message in Outlook Web Access 2000

How to troubleshoot the "503 Service Unavailable" error message in Outlook Web Access in Exchange Server 2003

Catch threats immediately

We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.

See what we caught

Did this information help you to resolve the problem?

Yes: My problem was resolved.
No: The information was not helpful / Partially helpful.