IMAP issues with Comcast since Nov 9th

On Nov 9th, all of my devices quit syncing with Comcast.  I use WIndows Outlook 2024 pro and my iphone and Ipad.  The error I get on my PC is "we couldn't connect to the incoming (IMAP) server.  None of the authentication methods supported by Outlook are supported by your server"  I also received a security warning "The server you are connected to is using a security certificate that cannot be verified.  The target principal name is incorrect."    I then tried my Iphone and Ipad and received the error " Invalid username and/or password.  Please check your SMTP user name and password.

Actions taken

- Review and made sure the Incoming and outgoing mail servers were correct (Example imap.comcast.net (port 993,SSL enabled)

- I changed my password on comcast to see if that helped the process.  It did not.

- I tried on a different network, no luck

- I totally deactivated Norton Firewall when signing in...no luck

- Cleared the outlook cache.  No luch

- removed and tried to re-establish the account.  No change

I am at wits end and it has been extremely frustrating.  Any ideas to help