Yealink bind "no answer forward" to a dsskey

Hello everyone,

does anybody know if it is possible to bind the feature no answer forward to a key on the phone. Currently I am only able to create a key which toggles always forward and I could’t find any other options in the key events.
My goal is to create two keys on the phone which will trigger no answer forward to sepecific phone numbers.

I have got an answer from Yealink. This feature is not supported.