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Https connection error of Flow with web Service

Hello. I have a web service which works fine calling it from browser, (returning some json), but it can not establish a connection with a flow HTTP action with the same url.

The application is registered on azure portal and has uploaded public key for a self-signed certificate for openssl.


Microsoft Flow.png

Community Support
Community Support

Re: Https connection error of Flow with web Service

Hi @kpavlidis ,


Per my certain research, I found that error message “Could not establish trust relationship for the SSL/TLS" could be caused by:

  • You’re using an invalid certificate
  • The certificate wasn’t issued by a trustworthy authority.

Please check the following doc for resolution:


Best regards,




Community Support Team _ Mabel Mao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Frequent Visitor

Re: Https connection error of Flow with web Service

So while it is working from browser without problems, flow does not accept this self-signed certificate? If this is the problem how do i create a self-signed certificate that will be acceptable?


Also where to install the cert since it is a flow?

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