BlackBerry Express 5.0 Vs. BlackBerry Professional 5.0

At our company right now we are using blackberry server professional 5.0.  I know blackberry server express 5.0 came out that is now free.  What is the difference between the two?  
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Hypercat (Deb)Commented:
I would double-check the Blackberry site if I were you, but as far as I know they are basically the same thing. The BESX (Blackberry Server Express) product may have a few more bells and whistles, like the ability to create more policies, but other than that I think the main difference is that Blackberry Server Express is free.  I think Blackberry has finally realized that to capture the small business market away from devices using Activesync with MS Exchange, they have to give the server-side product away  :-)
jmkotmanAuthor Commented:
can it still support add-ons such as live communicator and blackberry mvs?
Hypercat (Deb)Commented:
I'm not sure about Live Communicator. BESX does NOT support Blackberry MVS, only standard BES does.Since BPS has been discontinued, it's a smart deal to upgrade if you want to get/maintain support from Blackberry. BESX supports up to 75 users if installed on an Exchange server, and up to 2000 users if installed on a separate server, so it's much more robust than BPS.

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Migrating from Professional to Express would be considered a downgrade by RIM and as such I haven’t been able to find any nice, easy to follow guides.  If you already have the “fancy” version up and running it will much less easier to let it be instead of trying to move databases and changing SRP ids.

As said above, BES Express can handle up to 75 users on the same server ut many more if on a separate server. No cals needed, juste the BES option on the unit. Of course like the professional version you will have less admin options than a normal BES.

Now migrating from BPS to BES Express can be a bit tricky mainly depending on how you do it. For only 3 users I would simply uninstall, install BES express and reactivate the users. Take a look here also :

pls refer to this

see here also
If you are talking about functionality, BES Express does not support high-availability, where BES has the ability to failover to a standby BES.

BES Express does NOT support some premium applications like Enterprise IM clients, Enterprise Social Networking Solutions, Chalk Pushcast Software, and the BB Mobile Voice System.
Are you using Blackberry PROFESSIONAL software (i.e BPS)? If so, that's version 4.1.4 and there are a large number of feature upgrades you'll experience going to BES Express.
Or are you using Blackberry Enterprise Server 5.0? in which case you're  better off sticking to that.

BES Express doesn't support enterprise instant messaging, so no collaboration service to connect to LCS/OCS/Sametime/Groupwise messenger. Also no support for MVS as hypercat has mentioned.
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