Same problem at this end with Microsoft Outlook send error ox800ccc80 - None of the authentication methods supported by this client are supported by your server. See Outlook error 0x800ccc80 as nobody at Hughesnet seems to be of assistance and Microsoft sends you to the Web.
Try the settings suggested in these posts:
Would someone please post a link to setting up email with Outlook 2020.
I was having problems with sending, started messing with settings, and now I can't send or receive.
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