error: Unable to resolve https://sX:443. Verify if the host name is valid.
means that the DLP scanner server cannot resolve the hostname to an IP address. Please try to open the URL https://sX.Xa.com:443/teams/test with Internet Explorer on your scanner host.
It seems as if the DNS server configured at the scanner host cannot resolve this hostname so you might need to add it to the local "hosts" file on the scanner server in c:\windows\system32\drivers\etc.
Open the hosts file with a text editor and enter a new line in the format
xxx.xxx.xxx.xxx sX.Xa.com
where xxx.xxx.xxx.xxx is the IPv4 address of the server with the name sX.Xa.com