File Property Author: How to use ComputeName as default author

I am not sure if it is right place to ask the question, but I think people here know a lot about computer.

Here is my issue (just making an example with fake name):

Microsoft Office 365 Account Name: John McCullough, which is signed in with Excel/Word, etc.
Desktop (PC #1): Sign in with Local Account (Name: JM), not sign in with Microsoft account.
Laptop (PC #2): Sign in with Local Account (Name: JM), not sign in with Microsoft account.


Desktop (PC #1): When I save an excel file, its default author name is JM, which is what I want.

Laptop (PC #2): Although it is also sign in with Local Account (Name: JM) with the computer, but when I save an excel file, its default file property author is John McCullough, which is not what I want. For example, if I upload a file here and I prefer not to expose my full name in file property. I know I can remove Author name from file property before sharing a file in public, but it takes time to do so and I may forget to do so.

How to use compute name as default file author name? Is it setting within Microsoft Excel or somewhere?

Thanks.

Edit: File > Option > General

What do you have set under the 'Personalise your copy of Office' section? Have you specified to use a particular name regardless of sign-in?

Originally Posted by rorya

What do you have set under the 'Personalise your copy of Office' section? Have you specified to use a particular name regardless of sign-in?

Yes, default file property author is set in that section. I think I set it before (long time ago), but did not check "Always use these value regardless of sign in to Office" in laptop. I rarely use laptop and did not notice the difference before.

But anyway, it seems file property default author has nothing to do with computer name, it is within Excel/Word setting. At least this is the case for Microsoft office files, but not sure other file type. I don't see author value in PDF file property.