I have upgraded a seperate BES Server from v 4.0 to 4.1.5 and also migrated a server to Exchange 2007 from Exchange 2000.
I followed the document below...
Basically I cannot send or receive email through the Blackberry. I have followed the document, double checked the permissions ran the relevant exchange 2007 scripts in the mamangement shell, removed the old unsupported MAPI's, install the correct cdo.ll's, rebooted both servers. No joy, RIM wont talk to me orange are not much help either, help!!