Hi @Ideatec Softwares India Pvt Ltd ,
maybe there is a second Network Security Group (NSG) associated with the Virtual Network in addition to the NSG associated with the VM?
In this case port 443 must be allowed inbound in both NSGs.
If there is more than one NSG associated you can check here:
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten