Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
That does sound like a scam.
How did you start this "Microsoft chat"?
Legitimate Microsoft chat should be initiated via Get Help app in Windows OS, or via official link https://support.microsoft.com/contactus
And it should not get you to a third party place. If you initiated the chat any other way, that can be concerning as there are many IT support scam out there impersonating Microsoft.