Ok here's the deal, a while back we had a disaster and I ended up rebuilding the Domain and BES server (Single server environment, and I won't bore you with the details).
Anyway here is where it's gone wrong we previously had SBS BES but had changed to a full blown BES, in the rush I installed the wrong keys and it's not till now that I've noticed, we had 15 users and now have another 5 turning up tomorrow. Now I do have 20 full on BES keys, what I want to know is can I just remove the old keys and put the new keys in without it screwing up the existing users? By this I mean I really don't want to have to activate all the existing BB's not only just because I'd have to explain my screw up.

BES Version 4.1.3.18

Any help gratefully received

Search the forum here for purging data in the LicenseKeys table ...

A sql script like:

USE BESMgmt;
GO
TRUNCATE TABLE LicenseKeys;
GO

... then put in the keys you want when you launch the bes manager.

You are the man