C2R Installs should support MAK key
The C2R installation should support MAK license activation
I've been trying to get the Volume Licensing Activation Center to generate a usable C2R-P compatible activation key for Project Standard for the last hour, and not one of the four CSRs I've spoken to there has any idea what this is or how to generate one. The last guy generated another incompatible MAK for me. This is seriously irritating, Microsoft. You've had months to fix this, and your workaround is a gigantic waste of time. I literally have one license for Project, so KMS isn't ever going to work for this deployment.
You can use C2R-P Visio installation side-by-side with Office 365 installations. C2R-P installation is available via ODT (Office Deployment Tool). Currently you can activate it either using KMS or MAK keys. C2R-P bits are akin to the Perpetual MSI bits in terms of feature and functionality.
For now, MAK keys can only be acquired via the Volume Licensing activation centers (here: https://www.microsoft.com/en-in/Licensing/existing-customer/activation-centers.aspx)
We are working on listing the C2R-P MAK keys in the VLSC tool.
The supported deployment and activation scenarios are listed in the help article here: http://technet.microsoft.com/library/mt703272.aspx
Grant Bordelon commented
Visio and Product for that matter. We should be able to use our MAK keys regardless whether 365 is installed or not.
We gave up waiting (>6 months to generate new keys is pathetic), we've ditched Office365 and just gone back to regular old Office 2016 instead so that we can actually use Project & Visio.