The first time you check your voicemail in Webex App, you're prompted for a PIN. If your administrator hasn't provided you with a PIN, you can use the steps presented here to help you create a PIN or change your PIN if you forget it at any time. While you're setting your PIN, you can also do things like personalize your greeting.
Sign in to your Webex Settings and select My Profile.
Click the "…" and select Reset Voicemail PIN.
Enter your New Voicemail PIN, making sure to meet the following requirements:
Re-enter your PIN in Confirm Voicemail PIN and click Save.