was curious since win2k3 is both 32/64 is anyone successfully running a version of BES?

Nope not supported unless you wanna migrate to Domino ... Windows 64-bit operating system support in BlackBerry Enterprise Server software version 4.1 Service Pack 4

Apparently someone did manage this using 4.1.4 and the Microsoft Exchange Server MAPI Client and Collaboration Data Objects 1.2.1.
Haven't tried myself and its not supported anyhow.

Who, Where?

count me as number two. ignorantly because i knew win64 does do both 32/64bit, i've had my BES with 20 users and growing in production for almost 8 months and i've had no problems and no complaints from end users.

i got yelled at by a RIM tech the other day, repeating over and over to me that its no supported, but he ended with im sure its working just fine.....weird conversation.

nice, well thats good to hear at least that it works. We just got a few servers free so I'm gonna do some testing!

I've done it - because I am poor! My SBS2003 box needed replacement. It's not a supported configuration, but works for me - running W2K3 Server X64, E2K7 and BES Express 4.1.4. Had to load CDO, fix an incompatability with Net 1.1 32-bit and Net 2.0 64-bit, and fix a ntbackup problem caused by loading MSDE2000 - but working fine for my 3 users (7290, 8700 and 8830) on AT&T and Verizon. This config also syncs great with my 2 Sprint Treo 700wx's using activesync.

Well ... at least the box isn't a domain controller ...

it is the DC. Small network, only about 10 users.

I think its going to be another day of drinking for me

Just heard from a customer we're working with and they have BES 4.1 SP4 working in 64-bit ... I guess its time to do some testing of this now unsupported function for BES for Exchange.

only reason i did it was because we're running an exchange 2007 cluster and ofcourse those boxes have to be win2k 64bit, i didnt want to run a mixed 32/64 environment and we had open licensing for 64 bit for those two boxes anyway so i just blew the other dell servers away that came with 32bit enterprise. i have no complaints, it works

Win2k3 64-bit is now supported with BES 4.1 SP4 - BlackBerry Search Results