Afte trying the fixes and experiencing off and on frustration, I switched to hotspot shield. This seems to be working quite well. I haven't had the office problems or onedrive problems that I had previously with nord. It cost me a new subscription,
but it's paying for itself by saving troubleshooting time.
Yes, Hotspot Shield worked for me, too!!!
(And I should point out that I have tried a number of possible fixes in vain while I was using NordVPN. Again, I'm running Office 365 Business under Windows 7. The problem was severe lags with Outlook -- so severe it could take five minutes to load the profile
and even longer to open a New or Reply email message -- and sometimes it would just open the profile and remain in "Trying to connect" for as much as ten minutes, and then sometimes go from that to "Disconnected" and never connect.)
Now, Outlook in Office 365 works like a top, just like it does when I have no VPN connected!
Apparently, the reason Hotspot Shield is able to overcome this issue, while so many other VPN services still exhibit it, is that Hotspot Shield uses entirely proprietary (and advanced) technology unique to them, while essentially all others use the few technologies
that are widely in use.
(I don't think the issue I was having was unique to NordVPN. I think most other VPN services would have still had the same issue I was having.)
All my reading up on Hotspot Shield indicates it's just great for normal business people. (It may be worth paying for the Premium, to avoid ads.)