[lawmangrant]

Can you check your mobile device settings inside the OWA panel? See if it's still there?

Maybe they have started enforcing certificates on the server, and you need to load them.

If you need certificates, there is a way to download them from the server, but check first to see if your device is still listed.

Also, blackberry accesses the exchange server through a different protocol I believe, so it could work without problems, and the other side be down.