Originally Posted by essexboy
The devices cannot browse the internet, nor do any 3rd party apps work.
If they have no data connection, they cannot talk to the BES. You need to get your hands on one of the afflicted devices and start troubleshooting the data connection.
Pull the battery and make sure it says EDGE or EVDO of NXTL under the signal bar. with so many affected, I would suspect that somehow your data plans got removed or there is an outage situation. Are they all the same carrier? If at least one device is working, I don't think it is the BES.