To change your PIN number via your user portal:
  1. Sign into your user hub at ATU.webex.com
  2. Go to Settings > Calling > Voicemail.
  3. Go to the Voicemail PIN section and then click Reset voicemail PIN.



 
If you need assistance with choosing a PIN number, you may find this site helpful:


To use the site:
  1. Set the "Password Length" field to however long you'd like your PIN number to be (minimum 6 digits)
  2. Uncheck: Include Symbols, Include Lowercase Characters, Include Uppercase Characters, Exclude Similar Characters
  3. Only "Include Numbers" and "Generate On Your Device" should be checked at this point
  4. Click "Generate Password"
  5. A number password should now appear on the page.  Please be advised, due to the Unity Voicemail system checking for Trivial PINs (trivial PINs include passwords that use your extension, spell out your name, etc,), you may need to generate and try several PIN numbers.

An example of a PIN generated on the page: