Can you please tell me why this happened and if there is any way I can recover that info? I have a backup tape. But since a lot has changed since this morning, I cannot simply restore the information from the tape without losing other vital data.
Secondly, while I haven't heard of your exact scenario, I would start by checking the following:
- Is there a chance that the other user did more than simply extend the end date for one of the recurring appointments?
- Are there any views or security permissions at play here? Double-check that neither is simply hiding your view of the data.
- Is Exchange Server public folder replication at play? If you have multiple replicas of the public folder in question, check which Exchange Server public folder replica the other user was connecting to versus the replica that you were connecting to; and consider tombstone intervals as a possible explanation.
- Have these kinds of problems been reported for any other Exchange Server public folders in your environment? If so, check the application event log(s) on any affected public folder server(s) in your environment for any errors or warnings from source MS Exchange IS Public.
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