Add a new Blackberry user/device on BES 4.1

does it matter which wireless provider the users are using? no, right?
How do I associate the device with the corresponding user?  
only information I need is their PIN?

It doesn't matter what service provider you use, all you need to ensure is that they have BES codes activated on their account.

Within the BES you just need to add the users and a activation password.  What the user does then is go into "Enterprise Acivation" on the device and enter their email address and the password that you have set and this will activate them onto the BES.  In the initail part of the activation the PIN is sent to the BES and you will see it appear beside the username on the server..

So how does the BES know what device belongs to what user if I don't need the PIN initially to set the user up?
In another words, how does the device know to activate with MY BES when they enter in the email & pw?

jy

Activations for new users are very straight forward as the Enterprise Activation icon/option is on the main screen.  If you have user that has been using their BlackBerry on a BIS account it is best to sync the device via desktop manager device to ensure they have all the latest calendar appointments and contacts transferred to the desktop.  Once you are sure all their data is up to date you should do a "Handheld Wipe" and then do the enterprise activation.  

Also if a user who was previously using BIS wont activate wirelessly make sure you check they have the BES codes on their account.  If they do have BES codes and it still won't activate ring you BlackBerry support number on ask them to clear your IMSI number of the RIM relay.  What happens is your phone IMEI and SIM number create an IMSI number which identifies your device on the RIM backend, when changing from BIS to BES there may be delays in your on IMSI being flushed and it will point your device to the BIS service instead of BES.  In this event you can trick the system by putting a different BES activated SIM in the device as this will create a new IMSI number and you can activate them onto your server.

*******So how does the BES know what device belongs to what user if I don't need the PIN initially to set the user up?
*******In another words, how does the device know to activate with MY BES when they enter in the email & pw?

Your BES server has a permenant connect to *.*.blackberry.net and your server has a unique SRP ID.  The users that you add onto your BES are then know at blackberry.net and are assigned to you SRP ID.  When you activate your devices it knows your email address and it also knows your server is where those accounts live so it passes that activation request to your server, so if the password you assigned makes that one of the activation request it will activate that user onto the BES.  Also during this activation process your device PIN is also assigned to your email address and server.

Very good information.

So as a summary,
-on the server side, all I have to do is add the user from BES manager, goto Properties and set an Enterprise Activation username & pw.
-from the users side, they'll have to goto Ent. Activation and enter in the username & pw I set for them.
correct?

This should go pretty smooth unless there are device issues as mentioned above which I'm hoping I won't be faced with.

I will be implementing this next week.

Thanks again.