The xdb features in our Sitecore 9 installation are not working. I get this error in the Sitecore logs:
Exception: Sitecore.XConnect.XdbCollectionUnavailableException Message: The HTTP response was not successful: Forbidden
IIS log shows this is a 403.16 exception. I've found various solutions saying this relates to a certificate issue, but none of the solutions have worked for me.
I see two certificates in the "Personal"(My) store with the name indicated in the Sitecore install scripts, on has "_client" appended to it. In the ConnectionStrings.config, all certs referenced show the thumbprint of only the first cert.
Any thoughts on why I get this error?
Please check if there are any Non Self Signed Certificates in Trusted Root certificates in the Trusted Root Certificates if so delete them or move to Intermediate CA. Please refer to this it may help https://sitecorecorner.com/2017/10/25/sitecore-9-xconnect-ssl-and-that-403-forbidden/