Apple Pushes iOS 6.1.2 to Fix Exchange Bug
Feb 19, 2013, 1:32 PM by Eric M. Zeman
updated Feb 19, 2013, 1:33 PM
Apple today made the iOS 6.1.2 system update available. This update resolves a calendar bug that caused problems between iOS devices and Microsoft Exchange servers. The update can be downloaded and installed over the air.
source: Apple