Comcast.net email problems with Outlook

Let me start by identifying myself as an IT professional,so I'm pretty confident that the problem exists but have been uinable to find a solution.  My comcast accounts are all in Maryland, but I found that while in Florida I was unable to send/receive email using Outlook (O365).  I tried all the troubleshooting steps, and was unable to setup a new profile, either manually or through Autodiscover.  So I just signed into Xfinity.com and was able to retrieve and manage email.  When I returned to Maryland, Outlook worked without an issue.

Now here in Maryland, working with a Comcast.net email account linked to an address in Florida, Outlook suddently quit working on all computers in my LAN.  Disconnecting from the LAN and using my phone as a hot spot everything worked fine, as did connecting to a different LAN.  

So there is some sort of disconnect between a comcast.net email address, Outlook, the LAN, and the billing location for the Comcast account--but not always.  I'm reaching out to find out if I'm missing something ... thanks in advance for any information.