If you are using the Office Customization Tool or want to specify the update channel manually, you must pick the same update channel as your existing Office installation is already using. For more information, see Overview of the Office Customization Tool. The OCT provides a web-based interface for making your selections and creating your configuration file to be used with the Office Deployment Tool. Instead of using a text editor to create your configuration file, we recommend that you use the Office Customization Tool (OCT). To use a Generic Volume License Key (GVLK) for volume activation with KMS, use the appropriate value in the table for the PIDKEY attribute. Then, edit the Product element in the configuration file, using the appropriate ID from the following table. To begin, download the most current version of the Office Deployment Tool from the Microsoft Download Center. For more information about deploying volume licensed versions of Project 2021 and Visio LTSC 2021, see Deploy Office LTSC 2021. These steps don't apply to volume licensed versions of Project 2021 and Visio LTSC 2021.For more information about deploying volume licensed versions of Project 2019 and Visio 2019, see Deploy Office 2019. These steps don't apply to volume licensed versions of Project 2019 and Visio 2019.

To get that MAK key, log into the Volume Licensing Service Center (VLSC) and use the key listed under 'C2R-P for use with the Office Deployment Tool.'

You need a different MAK key to deploy volume licensed versions of Project and Visio with the Office Deployment Tool. MAK keys that you use for Windows Installer (MSI) installations of Project and Visio won't work with the Office Deployment Tool.

Visio 2016 key