Hi @pieter,
Welcome to the Docusign Community!
We are glad to have you here and can't wait to help share as much knowledge as possible.
I understand that you are looking to update your Phone Authentication number, and I will share more details on how to accomplish your goal.
Only the envelope’s sender will have the option to update your Phone Authentication number, as described in the guide below:
Add Phone Authentication for a Recipient
Feel free to let us know if you need further assistance with this.
Thank you for using Docusign, we hope you have a wonderful rest of your day!
Best regards,
Alejandro R. | Docusign Community Moderator
Please click "Best Answer" below if you find my reply to be a valid solution to your issue!