[ppittman]

Been using the SA account for BES SQL login so need to change this. Once the new accont has been created in the BES database is the new configuration straightforward setting up?

Stop Blackberry Services.
In Blackberry Server Configuration/Database connectivity, enter the new login and password, click test sql server connection. (We use SQL auth not windows trusted)
Reboot

Anything else?

[freakinvibe]

You should check that the new account has dbo rights on the BESMgmt database.

[ppittman]

Checked on another couple of accounts we support and the BES sql account on all of them has sysadmin rights.