Outlook not showing recipient name from email header

I did a little more testing.  I sent a request to DocuSign where the recipient was Abe Lincoln, but I used a non-M365 email account I could access via iPhone, web mail, or Outlook (on a different computer than the one I'm seeing the issue).  When DocuSign sent the email request to "Abe", his name was displayed as the recipient.

This is what I'm seeing in the browser looking at web mail.

And this is what that email looks like in Outlook.

When I use a M365 account and view the email in Outlook.com, it looks like M365 is messing with the recipient's name -- it should say To: Abe Lincoln.

Is there a setting somewhere that prevents M365/Outlook from changing the recipient's name as received by the email server?

thanks,

randy