Failed in WinHttpSendRequest API, ErrorCode = 0x2efd

Question

I had recently created new DP, Configured to use HTTPS, CERT is fine. But Continued to receive below error in datatransferservice.log though firewall is turned off in both Client and DP. any guidance here?

Answer 1

![212807-microsoftteams-image.png][1] [1]: /api/attachments/212807-microsoftteams-image.png?platform=QnA I see binding for 443 is missing in iis of new dp. Is it really required to add binding for 443 in IIS?

Answer 2

Hi, anonymous user

Thank you for posting in Microsoft Q&A forum.

Yes, it's required to add binding for 443 in IIS on DP if we configured to use https mode.
Here is the guidance to deploy web server certificate for site systems that run IIS:
https://www.prajwaldesai.com/deploying-web-server-certificate-for-site-systems-that-run-iis/

We also need to deploy the Client Certificate for Distribution Points:
https://www.prajwaldesai.com/deploying-the-client-certificate-for-distribution-points/

(Please Note: Since the websites are not hosted by Microsoft, just for your reference.)

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Answer 3

Thank you, I realized that by comparing with other DP and made it to work. Cheers.