We have a customer who replaced her older iPhone with this new 4S. The old phone was working perfectly for all content to sync from her exchange account in both directions.
This phone everything works except only 1 direction (server to phone) for Calendar.
What steps can I take other than removing the account and re-adding which I have already tried and it didn't work.
Basically nothing inputted from from the calendar on the phone is syncing back to the server.
Exchange 2007 fully patched.