Windows 10 20H2 ad Office 365 latest version

When I send email from Outlook the name displayed seems to vary in format for no particular reason.   I need a way for every email to show the display name  PLUS   the actual email address associated with it in Contacts.  This same format needs to apply when receiving email from anyone but i cannot find any place to chose what i want displayed in those fields. 

I have no idea why a very few contacts work in the way I need them to but most do not.
John and Mary are husband and wife but Johns emails always show his full email address inside a parenthesis after showing his display name of John Doe.
(example To:  John Doe ([email protected])

When receiving email from people, I would also prefer that it show both the display name as well as the complete email right beside it in the same manner rather than showing only the display name.  Oddly enough, on John Doe, when he send me email it dos NOT show his full email address but only his display name which  makes me wonder if this is due to something done by 'autofill'

I have noticed that a few other people also work as John Doe does but 90% or more do not.   Outlook is using the offline global address book and i have checked their contact cards in that list and cannot find any differences.  I thought it might be a property of the address list used but that doesn't seem to be the case. I also cannot 'force' this format as Outlook replaces the full address with the display name in 90% of the cases But not for John Doe and a few others where it shows the Display Name and the full email address inside the parentheses.  I also have autofill turned on and this is the way autofill adds the address for these people.

Is there any setting located somewhere in Outlook that I can use to get the From and To: fields to always display both the display name as well as the actual email address  for all email such as   To: John Doe ([email protected])?   Instead of only showing the display name of just To: John Doe

Robots.txt always seemed to do the job but we have recently found that it no longer seems to work as well as it used to.  Various documents and other items were recently found in a Google web cache that in theory should not have been there.  I just wondered if there was any better way to prevent having every file in every site posted somewhere in a web cache?  Is robots.txt still the only and best thing to use for an apache website?  if possible I would like for Google to forget the whole domain exists as it contains private files that are in a preliminary stage. No need to for anyone to ever be able to find them through a web search

Thanks, Shades
I will definitely look at that
the site is an Apache one and I need to review the option you presented
it probably would be fine
we did have a perfectly good Document manager site but too many people wanted it 'easier' meaning no tracking of anything
that left it with no way to manage anything either.  Originally each user had a login and password so could be identified and access controlled
now the whole site has a single login and password so there is no way to manage who can see what.  As far as the site can tell there IS only one user :(