MANAGING RECURRING APPOINTMENTS

Concepts and technologies are described herein for managing recurring appointments without losing historical data associated with the recurring appointments. In accordance with the concepts and technologies disclosed herein, a recurring appointment definition can be modified without deleting the recurring appointment definition and/or losing exceptions, notes, and/or other data associated with the recurring appointment definition. Additionally, the concepts and technologies disclosed herein allow the modification of an existing recurring appointment definition without creating a new recurring appointment definition. Thus, synchronization between rules-based calendaring applications and expansion-based calendaring applications can be accomplished without creating multiple instances of related recurring appointments created due to modifications of the recurring appointment definition.