UPDATE2
Honestly all I can say is that to ERR is Human not Computer. So last night I switched everything over and not thinking about it all was fine until mid morning and I had no email in Outlook on my laptop and phone. What a royal pain in the rear end as you have to reset everything initially as a Yahoo.com then go and change it to comcast.net. The laptop was way easier than my phone which is android running outlook 365.
UPDATE_
So tonight I tried it again tonight and everything just went through and I set up my yahoo email.
When I logon too my email via the webpage it has a link to go to yahoo.com to setup my email box. Sadly the links take you to a logon page on yahoo that goes nowhere.