Log into the Nextiva admin portal here -- https://authenticate.nextiva.com/AccountValidation/login.action (nextiva admins only)

 

Select the first option -- Voice. 

 

Navigate to "Manage Users" under the "Users" tab.

 

Select the appropriate user.

 

Scroll down to the "Security Information" section. 

 

Click the "Reset Password" link. This will send a password reset email to the user.