delete a lot of appointement from iphone

[NOZIL]

A user had benn able to delete all of his old appointment (at least the last 3 months) from his iphone. I saw the delete commands in the mailbox.log

But searching in iphone menus, i don't know how to to this !!!

Do you have any idea how he could have done this ?

[uxbod]

What does the user have set for Settings -> Mail, Contacts, Calendar -> Calendars -> Sync on the iPhone ? Do they have access to the ZCS web client at all ?

[NOZIL]

Events from one month (i have the same with no problem).

And he does not use ZCS webclient, but his assitant yes. She has a "admin share" of his calendar. And she called me last week because in her boss's calendar, all events between sept 24th till dec 10 have vanished !