I need a human to intervene to reset my IMAP authentication tokens (error 0x800CCC0E)

Of the 4 accounts, I only changed one yesterday as Xfinity made me just to try to sign into Webmail. Outlook does prompt for a password, and again, even for those accounts that I did not change the password, it will not recognize it. (Even for the one account where I did change it, I used the new one in Outlook and my iPhone, and it still wouldn't recognize it.) I tried signing in with the other 3 accounts for WebMail, and they all ask for me to reset the password. I have not done that because that seems to be a moot point. 

The email client setup instructions above don't give specific settings for iPhone/iPad or Classic Outlook-- they go to Microsoft and Apple websites with generalized instructions. The email configurations settings are correct for all the accounts. I may have changed one, but it was according to your instructions just to see if an alternate number would work, and it didn't. They were all set up correctly in the first place. They all worked perfectly fine until a couple days ago when they suddenly just stopped working for no reason on my side. 

I'm a relatively experienced person in setting up my email accounts for decades at this point, and even referring to all your help knowledge content, doing web searches, and even consulting both Xfinity's AI (which is worthless, by the way) as well as other AI tools based on the error I'm getting from Outlook for the actual error message and error code, this is 1000% on your side, not mine. 

Thanks for providing these details, @techcommgeekmom. After changing the password for the 1 account, did you try to fully remove and re-add that account into Outlook? I have seen this in the past where Outlook was still storing the old password, even when updating it in the settings, but removing and re-adding the account resolved the problem.