It can be considered technical in that all BBs have the necessary stuff for security (including granular security offered by IT policies and enforcement of the use of a proxy server), centralized management and intranet access out-of-the-box. Im not saying no other mobile can meet such requirements but often it requires additional software.
While nearly everyone is familiar with the BB, there arent as many that are truly familiar with the BB in a BES environment. Its quite different from the consumer (BIS) world. BES does a lot more than just forward email.
I see where youre coming from, but to me the cost of implementing BES these days is really, really high compared to ActiveSync. With Exchange 2007 and 2010 (and I think 2003 also, but Im not sure off hand) you can enforce the same kind of security policies you can enforce on a BB on an ActiveSync device. You can remotely wipe the device and enforce a complex PIN code on the device if you wish. For the vast majority of the clients we deal with, they need no more security than this. I know you can push certain apps and things to the device from a central source, but I havent run into a client yet who needed/wanted that. ActiveSync and do all the basic things BES can do right out of the box and all you have to do is flip the switch on ActiveSync. It comes with Exchange which makes it easier to implement. Plus, BES is a PITA to fix when it breaks. I hate nothing more in life than dealing with a broken BES server. If ActiveSync is busted, then either your Exchange server or IIS is completely toasted and youre got bigger headaches than just email not working. This is just my personal opinion though.
I took it to mean policy as well. Our policy is to only support company-issued Blackberries as well.
I like policies of only supporting company issued devices myself.
Yup -- and whether or not personal devices are allowed.
This is a good point. Im not a fan of companies officially supporting personal devices though I work for several who do. Not only do you lose control of what the user can and cant install on the device but you usually end up having to support every little weird device some user comes in with. I do know some companies that support personal devices, but require them to be WinMo devices. Im not fond of that policy either as I think WinMo is such a huge fail in the mobile world.