Troubleshooting AD authentication issues due to port exhaustion issues
Troubleshooting AD authentication issues due to port exhaustion issues https://learn.microsoft.com/en-us/troubleshoot/windows-client/networking/tcp-ip-port-exhaustion-troubleshooting If found system event id 4231: Get the processes consuming too much ports: Get-NetTCPConnection | Group-Object -Property State, OwningProcess | Select -Property Count, Name, @{Name="ProcessName";Expression={(Get-Process -PID ($_.Name.Split(',')[-1].Trim(' '))).Name}}, Group | Sort Count -Descending nlteest /sc_verify:domainname Enable debug for Netlogon: https://learn.microsoft.com/en-us/troubleshoot/windows-client/windows-security/enable-debug-logging-netlogon-service Nltest /DBFlag:2080FFFF