Managing personal Outlook.com account settings, security, and privacy
This seems to be caused by their "Modern Authentication" protocol/system.
When using Office Outlook 2013, this was constantly happening, mostly because Microsoft REMOVED the one update for Office 2013 that added the code for that new system. SUCKS!
I currently am able to access my 2 Microsoft email accounts. Here's how....
I don't use Outlook 2013 for those. I only use it for a Yahoo account, without issue.
I haven't had the error nag problem since I've done 2 things.
- First, on one Computer, I log into the web version of Outlook/Live.
This issue doesn't happen.
- Secondly, on a different computer, Windows 10, I use the Microsoft Email app.
This issue doesn't happen and I have 3 accounts set up.
On a 3rd computer, also Windows 10, fortunately, long ago, I got Office 2016 and kept that patched.
On Outlook in Office 2016, I have my 3 email accounts and all work fine, without the error/nag.
Hope that helps.