I just received 230 Cisco 6921 phones. when I add phone to network it auto register but in applications there is no Extension Mobility so users can't login.
If I go to device->phone select auto register phone(just added) and mark checkbox Enable Extension Mobility in applications I see Extension Mobility option.
How can i enable Extension Mobility by defaul on all phones? so that all auto register phones are ready "out of box"?
You can't, auto-registration only provides the most basic settings for a phone to work.
Use BAT to check the EM enabled checkbox on the phones after they auto-register or use BAT to insert the phones.
if this helps, please rate
Do an "Export Phones -> All Details" for the phone model you want.
You'll basically get the full BAT template with all options you have. Then you just have to edit what you want and update the phones.