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Open a Safari browsing session and sign into the webmail interface at
https://connect.xfinity.com/appsuite/#!!&app=io.ox/mail&folder=default0//qgzl1Nrzvv%23Rs}lnldgzmqvv
OR---enable the account in the Mail app that comes bundled in iOS
OR-----download the Xfinity Connect app and enable the account in that----------
https://apps.apple.com/us/app/xfinity-connect/id320788270