Log into https://app.onsip.com/ then, select Administrators at the top right corner.

Choose Users on the left.

 

To add a new user, click the right side of the screen, select Add User. In the Basic set-up section, provide the user’s name and email address. Optionally, you can add a mobile number and extension.  

 

When adding an extension(s) select the "Add Extension" option .

Then key in the available extension you wish to use and click the "+" to add the extension to the list of extensions.  The extension should appear in the Extensions box.

 

Then select “Create User”.

NOTE: We recommend that extensions are four digits long starting with number 7. For example: 7001. You can add multiple extensions for a user. For instance, you can create an extension to be used internally and an extension that will be dialed externally, or from customers calling into your main line. You can create as many extensions for a user as you'd like without any extra charge.

 

Next, in the Voicemail Box section, you will have the option to “Add voicemail box” or select from an existing voicemail box that is not in use.

To add a new voicemail box, click “”.

 

Finally, in the Advanced set-up section, you can choose to add the User to a Group, add an e911 Location and choose to send a Welcome Email or Voicemail Configuration Email.

Select "Finish" to complete the set up. 

Once created, the new user will be in the User list alphabetically. You can search by the user’s name at the top to find the newly created user. 

Click on the user’s name to expand the fields, here you can further customize your user’s information by clicking "Edit Info" at the bottom of the screen.

 

See the following on Editing an Existing User.