Azure migration port

Hi 

I am new to Azure Migrate, we are in process of migrate on-premises virtual server (VMware) to Azure VM. 

We have install Agentless appliance and notices that all the performance data missing for all VMs in my assessment report.

with some  research found that it required  that outbound connections on ports 443 (HTTPS) are allowed. 

Can someone please help me understand  source and target  between which i need to open port 443

Thanks 

suraj