A previously cancelled Outlook meeting re-appears, and one hour off

Q: Can anyone explain the re-appearance of a cancelled meeting with a start time one hour off the original scheduled time? A previously cancelled meeting reappeared on my calendar (at the wrong time) and there are no meetings scheduled. I sent cancellation notices for an upcoming meeting that was set up before DST.

A: Sometimes cancelled meetings show up with a start time that is one hour off when a meeting wasn't cancelled correctly, it comes from a corrupted mailbox or from an old, undeleted mailbox. This is a known issue and end users may ignore these meetings.