I have a user who syncs his calendar to four devices, his laptop (using outlook 2010 in cached mode), an ipad, an iphone and a blackberry. He also has an assistant accessing his calendar from her desktop. From time to time the assistant does not see what the user sees in his calendar. Could syncing his mailbox and calendar across four devices be a problem?
Are there any documented issues syncing an exchange mailbox with both a blackberry and an activesync device? I know that BES writes hidden data to the mailbox, does activesync do the same?
The assistant was caching his calendar on her PC, so I turned that off. Also his laptop's outlook profile has been rebuilt and the OST file on it is under 2 GB in size.
I'm guessing its the multiple devices causing conflicts with one another during their sync cycles, but I can't prove it.