I could not figure out a way to remove values from extensions contact information using the API.
Both Update Extension and Update/Replace User seem to not offer the functionality to remove values, e.g. the mobile phone number.
This is a common use case in our company, people having a mobile number migration to VOIP and therefore loose the mobile number. In such a case an automated process should remove the mobile number from the contact information.
I tried sending empty value (with " and without), sending null.
While everthing that is not a valid number returns a validation error, sending null (which I would have expected to be the right way as specified in JSON) does not send an error, but does not have an effect at all.
So how can I remove contact information using the API call?