Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear @Phichai Sing,
I understand that you are having trouble locating your Public Customer Number (PCN) to register your Office 2016 volume licenses and have not received a response from email support.
Please note that Microsoft has retired the Volume Licensing Service Center (VLSC). All management for volume licenses (including Office 2016) has moved to the Microsoft 365 Admin Center.
The PCN is a unique identifier assigned to your organization’s volume licensing agreement. You can find it using these methods:
- Check Documentation: Search for your original "License Confirmation" or "Agreement Welcome" email from Microsoft. The PCN is typically listed in the header or the "Organization Details" section.
- Contact your Partner/Reseller: If you purchased Office 2016 through a Microsoft Partner or reseller (CSP/LSP), they have direct access to your account details and can provide your PCN immediately.
- Microsoft 365 Admin Center (If you have access):
- Sign in at admin.microsoft.com.
- Go to Billing > Your products. Select the Volume licensing tab.
- Click on View contracts; the PCN is often displayed alongside your organization name in the contract details.
Please refer to this guide: View volume licensing contracts in the Microsoft 365 admin center | Microsoft Learn
Since you haven't received an email response, I recommend using the Phone Support or Web Form options for faster verification:
Call Volume Licensing Support: This is the most reliable way to authenticate your ownership. You can find the specific toll-free number for your region here: Contact Volume Licensing Support. When you call, have your Authorization Number and License Number (found on your purchase invoice) ready. Support can use these to find your PCN for you.
For more details on this transition, please refer to the official documentation: Manage volume licensing agreements | Microsoft Learn
I hope this clarifies the situation. Please let me know if you have any other questions.