To edit a user on your TrueVoIP system, first login to the TrueVoIP Manager Portal.

For more information about accessing the portal, see the article Accessing the Portal.

Once inside the manager portal, click the Users button on the top menu.

Next, click the name of the user you want to edit.  Scroll down to the bottom of the Profile tab to find the Change Voicemail PIN section pictured below.

Enter the desired voicemail PIN taking note of the restrictions and click the Save button.