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The TCP ports required by Active Directory Domain Services are already in use on this computer.
Check for open ports using this free tool : Port Checker – SUDOBITS Blog
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Domain controllers required ports: Use PowerShell to check if they are listening
Using PortQry to Check TCP/UDP Open Ports (Port Scanner) | Windows OS Hub
5 Ways to Check if a Port Is Opened - wikiHow
Open Dental Software - Open Port 3306
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Ping Specific Port {in Linux & Windows} | phoenixNAP KB
How to Check Which Ports Are Open on a Windows 10 PC
