We are using:

ZIMBRA 6.05_GA_2213.UBUNTU8.NETWORK 2.FEB. 2010,
and BES professional (running fine).

Now we want to switch to BES EXPRESS on a new server.

Is it possible to connect 2 different versions of BES on 2 different servers
to one ZIMBRA at the same time?

We want to use the BES in parallel for the time we need to move the users from the old BES to the new one.

Thanks for any hints!