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Aneesha SAneesha S 

Two way certificate authentication

Hello,

We are working on a REST integration wherein we request for some information from another service. The request is authenticated through CA signed certificate. This is working fine in one of the sandboxes. But when we moved it to another sandbox it is failing. 

Only the root and intermediate certificate is configured at the server end so that server can accept request from multiple sandboxes. I created the certificate from new sandbox, got it signed with CA and started using it to send the request. I get the 400 "Bad request" response. Server is not erceiving the request from new sandbox. Any suggestions on what the issue here is?
Rahul KumarRahul Kumar (Salesforce Developers) 
Hi Aneesha,

may I request you please refer the below link for reference. I hope it will be helpful.

Please mark it as best answer if the information is informative.

Best Regards
Rahul Kumar