https://support.ringcentral.com/s/article/How-to-change-PIN?language=en_US
This article will guide you on how to update your Voicemail PIN in the event that it has been forgotten or a change is necessary.
The PIN is used to verify the User's identity when checking their voicemail from a phone. Users who forget their voicemail PIN may follow the steps below to change the PIN.
1. Log in to the RingCentral Online account. If you logged in using an admin account, click Admin Portal > My Extension.
2. Go to Settings > User Details.
3. Under User Details, click Change Password.
4. Enter your Current Password. This is to verify the changes you are about to make. You can click on the eye 
icon to toggle show/hide your password.5. Click the Change PIN tab.
6. Enter the new PIN under New PIN and Reenter New PIN. Follow the PIN Criteria as you type your new PIN.
PIN Criteria
• Only Digits
• No Sequential (ex. 1234, 7890)
• No Repeating (ex. 222, 050505)
• No Account Information (ex. Extension number, phone number)
• Length should be 6-10 digits
7. Click Save.
