Hi there.
We are on Exchange 2013 Server Standard using Outlook 07, 10 and 13 on Windows XP and 7 workstations connecting via Exchange (not POP, IMAP, etc) with Encryption enabled and HTTP.
Clients are all having the same issue. They must hit Dismiss on appointments multiple times, sometimes more than twice. I've tried /cleanreminders with no luck, as well as turning off Cachced mode and recreated Profiles. I've also made sure that each user has only one data file entry, although all data is stored on the server.
Thanks.