Yep pressing 7 and deleting the teleworker config works, we just thought it was supposed to be seamless so that yeah you can configure a phone for teleworker by

1. Setting it up on the teleworker server
2. Setting up the external IP on the phone by hitting 7

But then figured if the phone is brought into the office, it should see its local, hopefully via a DHCP option or something, and temporarily bypass the teleworker config. If the phone is then taken out of the office, a home router will not give it that special dhcp option and the phone will default to teleworker. Thats how I thought it worked anyway. Not a huge deal, we only have 5 teleworker licenses but man it could make a difference between only ever having those 5 to possibly needing/using a lot more if it worked seamelessly like I thought.

Mitel 3300Mxe running MCD 4.0, 5340 Phones