question

VaishnavP-9935 avatar image
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VaishnavP-9935 asked WendyLi-MSFT edited

Authentication failed because the remote party has closed the transport stream

Error log

Failure Sending mail.
Authentication failed because the remote party has closed the transport stream

Not possible to connect to the mail server smpt.office365.com on port 587"

The email Encryption method used is TLS 1.2
PORT:587
SERVER: smpt.office365.com
SSL: yes
Kindly advise, as the issue occurs after 1st Oct 2021

office-exchange-server-administration
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1 Answer

VaishnavP-9935 avatar image
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VaishnavP-9935 answered KaelYao-MSFT commented

The Application supports only TLS 1.0 and that has to be upgraded to TLS 1.2 version which will resolve the issue.

· 1
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Hi @VaishnavP-9935

Glad to hear the issue has been resolved and thanks for the sharing!
Please feel free to accept your reply as the answer to the question.
It would help other community members as well.

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