Unless something has changed, it's something that the user needs to put in themselves. That's how MS tracks how many devices a user is licensing Office on. They are limited to X amount of devices they can run 365 apps on.

If anything you should be training users to know what their 365 credentials are which hopefully match up nicely with their email address (not always the case, but when it does match up its a lot easier for the person to activate since there is no confusion surrounding what information they need to provide).

Ok. Thank you for the quick response.

Regards,
Mitch

I looked into something like this and found no personal information gets stored on the Mac when activating.

Basically, Office generates a unique ID for the Mac once the user has entered his Office 365 credentials. That unique ID gets stored at Microsoft. Going forward, only the unique ID gets passed to Microsoft to renew the activation.

You may be interested in looking into volume licensing if you want to avoid activation. It can be more expensive, but that's one of the benefits.