Outlook Calendar appointments have changed from appointment entries to mail messages. These appointments were in a series. There are many appointments at various times that are also series. At first, only a few were affected, now for some reason more and more of these appointments display mail messages when I click on them instead of the appointments.
The series pop up doesn't come up and it goes straight to an email message. Nothing can be modified on it. It closes after modifying, but does not keep the changes, send is greyed out and message cannot be forwarded.
This happens after the appointment has been modified in one occurrence and then saved. It then changes that occurrence to a message that cannot be modified or deleted. All other occurrences in the series are unaffected and can be changed or deleted normally.
This is a shared calendar being accessed by both Outlook 2007 & Outlook 2010