[Fletchi18]

We currently have an Exchange 2003 server running with our BES server (v. 5.0.2.28) and we're going to Exchange 2010 in a few months. Is there a version of the BES software just for Exchange 2010 or will our current BES work with that new Exchange version?

Thank you in advance for your help with this!

[knottyrope]

current will work, but you neeed to do some work a well.

KB22601-How to migrate from Microsoft Exchange Server 2003 or 2007 to Microsoft Exchange Server 2010 in a BlackBerry Enterprise Server 5.0 environment

[Fletchi18]

Thank you very much for this information.

I couldn't see anything in the article, but do you know if this works for a phased upgrade (we plan on moving 10-20 people to Exchange 2010, test, and then gradually move the other users over a few days/weeks)? Will the users who are still on Exchange 2003 still be able to get mail on their devices after some of these steps have been performed?

Or, since we're doing it that way, should we build a new BES and simply move the user from one BES to the new one as their mailboxes are moved in Exchange?

[knottyrope]

it can run both 2003 and 2010 on same BES server, but move BASAmin first and test it one user before moving more.