Thunderbird Client Email Settings

Have been using Thunderbird with Xfinity mail since day 1 ( ~10 years) with very little issue.

Started having issues last month. So I uninstalled and performed a fresh install of Thunderbird thinking database corruption.  Some client mail boxes update, although slower than usual.  However my main email in the client does not. 

I searched the internet and found some recommendations months and years old.   My problems are more resent as if something changed on the Xfinity end.

I have 4 emails at Xfinity, what are the correct incoming, outgoing server settings, port # for Thunderbird?

What password setting should I use and what encryption if any? 

Is there any other setting I should check?