Dont know whether this is the right place but here goes:
We have a 2000 domain with some 2003 servers in it as well. We have just installed a 2003 Exchange Ent Cluster which is working fine, however, it had SP2 installed and affected our Blackberry Server. We applied the SP2 hotfix and followed the instructions from the knowledge base and all seemed fine. Now we have tried to add another blackberry to the server and one of the actions is in the user profile in AD it to grant BES admin permissions to send as and receive as in the Security option. This is fine and the permissions are there and the blackberry works but after about 20 mins the permissions "disappear" and the blackberry is unable to send but can receive. I have changed it again and again and replicate but it still keeps happening and I dont know why it keeps losing the permissions. There are 3 DC on W2K Sever with all relevant patches etc applied. All the other blackberry's are working fine so I am at a loss. We have create a new user and that does the same thing. Does anyone have any idea why this is happening and what can be done to fix it?