I just bought the Galaxy S2 2 weeks ago and it is used for both home & work. Last week I was forced to do the upgrade. Before the upgrade my Outlook Exchange email was great, after the upgrade I continually get the error that I need to 'update my security settings' & it won't connect to the exchange server. I've removed & added the account multiple times, checked my settings and each time I try to manually sync I will get maybe one or 2 emails before getting the error again. My settings are exactly the same as before the upgrade, nothing has changed there. I've not had any issues with reading the emails, attachments or 'replying to all', just that the sync isn't working.
My Google email account is fine, it's only the Outlook exchange that's affected. (I did have an issue with the contacts syncing up w/Facebook, Outlook & Google but that's not a problem anymore.)
Any ideas? I rely on my phone for work when I'm not near my laptop & a manual sync request just isn't reliable.
If there are any hints/tips/suggestions I'm ready to try them!