After I got the OTA update my Corporate Sync quit working. I had it set up for my college's email address. The account showed up in the settings, but it failed to connect/sync each time.
So I deleted the account and tried to reinstall it using the same settings that worked on Froyo. That didn't work. Then I read through the instructions a little closer on the Outlook web client and found a little blurb about some devices (I think one of the iPhones was one) using the SMTP info for the server name, instead of "m.outlook.com". Also, the username was my full email address, not just the part before the @. After I set it up this way it started to work again. No reset needed. Thank goodness!
So if you can manage to remove the broken Corporate Sync account and re-add it, you might luck out like I did.
Hope this helps.
Bel isi,
-kyle