System unavailable message appears in Exchange Server 2007 after the ForeFront installation

Hello Folks,

I’ve worked in a customer that started to get the system unavailable message message in all the webservices after a ForeFront installation.

Some of the symptoms:

  • Three of the Application Pools on the IIS Services manager are stopped and we cannot start them

  • OWA, Autodiscover, OAB returns the same error message: System Unavailable

  • Event ID 2268 and 2274 with source W3SVC-WP

Then, what’s the problem? How can I solve it? Here is the Microsoft KB to solve this issue:

Best Regards,
Anderson Patricio

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