Recently, I got an email from Salesforce, notifying that one of my self-signed certificates is going to expire soon. As a solution to this, I created a new self-signed certificate and replaced the references of old certificate with the new one in all the connected apps, installed packages. I had shared the new certificate with the vendors that are having SSO enabled for Salesforce. However, none of my SSO's are working as they were previously. How do I fix that? Have I missed something really important? Please help.