No more endpoints available in the MySQL endpoint mapper _mysql

This is because you have installed MySQL in a step to check the "ADD firewall exception for this port", but your server's Windows Firewall is not open, so there will be this prompt, generally click OK, OK, No system errors are generated.
Windows Server 2003 genuine systems do not have Windows Firewall turned on by default, and some of the original piracy is not open, and it is not recommended to use a variety of landscaping, modified Windows Server class system. After all, this is the server.