Hi everyone, After updating Exchange 2007 SP3 to CU6, a very unusual error has occurred. We have a few users that are experiencing problems with recurring events, whereby prior to the update changes were made to individual instances, and were received by all - however post update, it's as if all changes have been erased. Dates, attendees, anything that was altered on individual instances has been lost. Any advice?

Hi, Does this issue occur to all the users and all the reoccurring meetings? Try to check whether they still can see the meetings via OWA. If OWA works, I suggest we run Outlook /cleanfreebusy on the problematic clients. If OWA still cannot see the meetings, it seems the free/busy entries are lost on the mailbox. You may have to recreate them. Thanks, Simon

Hi, Does this issue occur to all the users and all the reoccurring meetings? Try to check whether they still can see the meetings via OWA. If OWA works, I suggest we run Outlook /cleanfreebusy on the problematic clients. If OWA still cannot see the meetings, it seems the free/busy entries are lost on the mailbox. You may have to recreate them. Thanks, Simon

Hi, This problem so far seems to only be for one user, and the OWA has the same problem. This is a high usage user with hundreds of events scheduled over the year, is there no way to repair this?

Hi, I am afraid the old crashed calendar cannot be repaired. Please refer to the following best practices when handling calendaring in Outlook: 829217 Considerations when you use the Delegate Access feature in Microsoft Outlook 281524 The delegate copy of a meeting request is sent to the Deleted Items folder 828493 A folder that contains a meeting request may be deleted after you accept the meeting request by using a remotely synchronizing mobile device Thanks, Simon

Hi, I am afraid the old crashed calendar cannot be repaired. Please refer to the following best practices when handling calendaring in Outlook: 829217 Considerations when you use the Delegate Access feature in Microsoft Outlook 281524 The delegate copy of a meeting request is sent to the Deleted Items folder 828493 A folder that contains a meeting request may be deleted after you accept the meeting request by using a remotely synchronizing mobile device Thanks, Simon