At Corneredge we support all PDA’s to ensure full sync with all customer email services. Blackberry’s are great for this, and typically very easy to setup.
I recently had to set up a Blackberry on a BES server on a new network we were supporting. Despite repeated efforts, the Blackberry consistently made contact with the BES Server, and then failed on the IT Policy.
The issue was this: even if your bringing a blackberry from a domain (domain.com) in Site A into a same-named domain (domain.com) in Site B, you must break the connection that the Blackberry’s PIN has over the Blackberry network. Until then, the Enterprise Activation will not work. This type of situation would come up when you change your MX record, for example.
You basically have two options here:
1. Contact the old BES host in the old site and ask them to remove the PIN; or
2. Go to the Blackberry Device / Options /Advanced / Service Book, and blow away the value “”Desktop [CMIME]”.
Once that happens, the Blackberry brings you through the mail setup routine as if it were brand new out of the box, and will sync fine with your BES server in the new environment.