TMG losing trust relationship with domain

[clareq]

Every weekend our OWA goes down with a "certificate has been revoked" error. On investigation it appears that the trust relationship between the TMG server and the domain has been lost, and we need to remove and readd the TMG to the domain, and then re-request the certificate from the CA. Exactly a week after we have done this it happens again.

 

So, why does it happen weekly, and what can we do to prevent it happening again?

[clareq]

Anyone - bump?

[sister_annex]

I'd check that your TMG is syncing it's time correctly - a sporadic clock will cause the server to drop off the domain.

 

Check the event logs for changes to the system clock - usually logged under time-service

[clareq]

Already checked that - the only time the server loses connection to the time server is after it loses its trust relationship.