@nang thank you so much for the information!

@nang Hi Nang, is there a way to get MAK Keys with a few hundred activation counts?

@nang okay thank you. Does it mean that the keys that were ‚alive‘ = they are working? What does the error code 0xC004C008 mean?
Do you have office 2019 pro keys with online activation?

@nang I have Office 2019 Pro Plus Retail keys that were working before using phone activation. Now, regardless of the key Im using I get this error mentioned before.
What can I do? Do you have keys that are working?

@nang hi, im getting error "Lets get you to one of our Answer Desk agents for help. I was not able to validate your installation ID. Please have the activation window up on your computer screen so you can have this number handy. The representative will need this number to help with activating your product."

Im getting this error with several keys rn, before it wasnt a thing. Do you know why?
Is this kinda new? Thanks for help