Nothing works, what are the specifics on the issues?
All this worked fine when BES was installed on our Exchange server.

Had to move BES to another box (XP) and now, no calendar!
Talked to BB support and went through KB to insure proper rights on BESAdmin account, still nothing. Thanks I know this thread is over a year old, but if you google "blackberry not synching with Outlook calendar" you might end up here.
The synchronization works with our free Deja Office for Outlook App that integrates with your device’s People Hub app.
Deja Office holds Outlook Contacts, Calendar, Tasks, and Notes in one integrated app that works with device features like Caller ID, email, maps, and text messaging.
The first time I did it, the service book came back, but the Wireless Sync option did not come back.
I repeated the entire process and the second time the Wireless Sync capability was restored.
Starting yesterday, for no good reason, users started complaining that when they enter a calendar item on their BB it doesn't sync with their Outlook. I have scoured the interwebs and read pages and pages of threads, posts and forums. Just to let everyone know, i have checked over and over again the settings of the BESAdmin user. We even made changes based on the video tutorials, but we are still in the same spot.
In order for calendar items made on the BB to sync with Outlook we had to add the BESAdmin user to the Domain Admins group.
Wi-Fi Sync Use your home or office Wi-Fi connection to securely sync between your PC and i Phone.