Synchronization with your iPhone failed - Recurring Meetings

Not sure if people are still looking at this post, but we did finally find a fix for the issue.

In the end we figured out that one of our exchange mail box users had something faulty in their profile. By "faulty", our exchange admins attempted to move the user's mail profile from one mail store to another, but exchange returned errors when attempting to do so.

In order to "fix" the issue we ended up deleting the mail profile completely from exchange and then recreating it from scratch - scary prospect when having to do this with someone high up the food chain... (prior export and reimport essential otherwise all data is lost)
(the user dealt with many meetings for multiple staff, and was a common factor between all users getting the issue)

I wouldn't call this specifically a MS issue as prior to ipad/iphones, these issues did not occur, and even while it was occuring, turning off mail on ipad/iphones meant the issue did not occur and other email clients had no issues at all
- so it looks like something in the iphone is not quite robust enough to be able to handle a few errors
(alternative theory: perhaps it is the iphone that created the issue in the first place??? We don't know when the issue with the actual mail account started and not enough resources to trowel through log files looking for a needle in a haystack)

Anyway, not sure if this will help everyone with the same issue, but thought I'd share our experience

mail profile issue - see my last post for details