Hi @Vishal Sharan ,
I see you tagged azure-webapps-ssl-certificates but can you clarify is this an on-premises environment of are you making use of the F5 Load Balancer offering in the marketplace along with an Azure VM running IIS. I'm not too familiar with F5 but https://support.f5.com/csp/home might be a better place to ask your question with regards to how BIG-IP handles traffic between itself and your web server.