Outlook 365 has error 0x800cc1a since Win 10 install, how can I fix it?

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Windows Central Question

Outlook 365 has error 0x800cc1a since win 10 install

I upgraded to win 10 and all works except email using outlook 365. Getting error 0x800cc1a something to the effect that the encryption is wrong and to contact your isp. I have contacted them but no help. have not made any changes. email works on win 7 machine and webmail, but cannot receive or send emails. Have tried SFC /scannow but did not help.
 

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