How would I configure a BB device to connect to a BES Account without installing Desktop Manager and synching with Outlook?

Thanks.

Have the BES Administrator setup an OTA password. You can then just type in the email address and the password into the Enterprise Activation app on the BB. Or the BES Admin can plug it in directly to his/her BES software.

I am replacing an old blackberry with a new one. will what you are telling to do stop the old one from receiving emails? and how do i purge the emails and contacts on the old one?

Yes. Talk to your IT department as they can help you get your new BB activated on the BES. To wipe the data off your BB just go to >Options >Security Options >General Settings and click the wheel and select "wipe handheld."