I just upgraded 1000 users from 3.6sp4hf3 to 4.0 sp 4 and am receving these errors in the event log. They just keep coming. Has anyone seen this error?

Event ID 2000 (emailaddress, pin = UID =) RequestHandler::SendSwitchService - Sending Switch Service command to device, Source UID S6855412,Destination UID S9059272

Any of the users devices running 4.x.x.x handheld software you should see this for. It is performing the enterprise activation for the users. Nothing to really worry about.