I am having a bit of trouble finding this information. I have a BES 4.0 server with Exchange 2003 (different servers). What I would like to do (or what I am being asked to do) is have every user in the organization with a Blackberry have the PIN for each other. This is about 30 users.

What I would like to do is put the PIN into the Global Address List so that when a user uses the lookup or copies the user to Contacts it will have an email and PIN associated with it.

When you do a lookup of someone with a BlackBerry the BES automatically returns the PIN.

Yeah, I know. They want this in place in the event the BES goes down. So basically everyones PIN is on each device, and a message can be sent out using PIN to let everyone know.

What I meant is that you do not need to add the PIN into the GAL because the users will get the PIN when they do a lookup. They can then add that user to the address book.

Eventually that idea will end in frustration. As you replace BlackBerry whether due to upgrade or dead equipment there is no mechanism for updating that person's PIN on everyone's address book. Eventually your users will be sending messages to the wrong PIN and may not realize it until they complains to the other person about not responding to their PIN messages.

The better alternative is BlackBerry Messenger. You can use the person's email as the address rather than a PIN.

Wallace Wireless
Itrezzo

Both are commercial offerings.

What I meant is that you do not need to add the PIN into the GAL because the users will get the PIN when they do a lookup. They can then add that user to the address book.
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If your server is down then lookup will fail I beleive. In that case, having user's PIN would be usefull. I agree with the rest of your comments

And one more thing. Lookup will return succesfully only if both users (sender and recepient) are residing on the same BB domain. (connected to a same sql configuration database) or else it will not resolve PIN of the recepient.