Activation Required Microsoft Office Professional Plus 2016 This product contains Change Product Key This product is unlicensed. Connect to your corporate network or contact your system administrator for further assistance.

The error message you are encountering indicates that your Microsoft Office Professional Plus 2016 is unlicensed and requires activation. This typically happens when the Office application cannot verify the license due to network issues or incorrect activation methods. Here are some steps you can take to resolve this issue:

1. Connect to Corporate Network: Ensure that you are connected to your corporate network, as Office may need to verify the license through your organization's Key Management Service (KMS).
2. Contact System Administrator: If you are unable to connect to the network or if the issue persists, contact your system administrator for assistance. They may need to check the activation status or reconfigure the licensing settings.
3. Use ospp.vbs Script: If you have administrative access, you can use the ospp.vbs script to check the activation status or manually activate Office. This script is located in the Office installation directory and can provide more detailed error codes that can help in troubleshooting.
4. Check Licensing Information: Open any Office application, go to File > Account, and check the licensing information. If it indicates that activation is required, you may need to restart the application after ensuring you are connected to the network.
5. Volume Activation Methods: If your organization uses volume licensing, ensure that the correct activation method (KMS or MAK) is being used. You may need to enter the appropriate Generic Volume License Key (GVLK) if necessary.

If these steps do not resolve the issue, further investigation into the specific error codes may be required.

References:

• Troubleshoot volume activation of Office
• Overview of volume activation of Office

accepted all questions

Hello @ITSupport SSLL,  

Good day! Thank you for posting your valuable question on Microsoft Q&A forum. 

Your Microsoft Office application is displaying “Activation Required”. This usually means the product is currently unlicensed and needs activation to restore full functionality. 

Here is what you should do next: 

Connect to Corporate Network 

If your device is part of our organization’s domain, please:  

• Connect to the corporate network (or VPN if working remotely). 
• Restart your Office application and allow a few minutes for activation. 

Change Product Key  

• On the device where you want to change the key, open any Office app, select the File menu and then select Account near the bottom of the menu. 
• Under Product Information, select the Switch License button. If there is no Switch License button, you may need to install Office updates. 
• Do one of the following: 
  • If you're signed in, select Use a different account, and then select Enter product key instead. 
  • If you're not signed in, select Enter product key instead. 
• Enter your Office 2016 product key, and then select Install this product instead. If your product key is new, follow the prompts to complete the redemption process. 
• Office begins the update process. Close all Office apps to finish the process. 

For your reference: Change your Office product key - Microsoft Support 

Contact IT Support 

If the above steps do not resolve the issue, please contact your IT team and ask for help with this issue. You can provide:  

• Device name and OS version. 
• Office version (e.g., Professional Plus 2016). 
• Screenshot of the activation message. 

Important: Office 2016 is out of mainstream support. For security and feature updates, we recommend upgrading to Microsoft 365 Apps. Please reach out to IT for migration assistance.

Please let me know if you need any further assistance. Thank you for your cooperation. 

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.