I have an iPhone 4S that I can't seem to sync to our corporate Exchange server.
Email syncs fine, however calendar items do not sync at all.
This is happening since 2 weeks ago.
I have removed/re-added the account on my iPhone, checked the time zone, have set the Exchange calendar as default, have set the sync to 2 weeks. Also, verified that the email address is not synced with iTunes. Nothing helped.