Our organization recently migrated from Exchange 2003 to Exchange in the cloud (Office 365) using a utility called MigrationWiz.
Below is a description of the problem:
1.Prior to migration: Recurring calendar meeting invites are created and sent to attendees
2. Post migration: The meeting Organizer changes the date\time of an invite
3. Attendees receive an email pertaining to the meeting change yet do not have the options to Accept, Decline, Tentative. The email shows "Not Current"
Any suggestions would be greatly appreciated