
Command Prompt Port Allocation Troubleshooting Checklist
When a service or application fails to start with a message like "port already in use" or "addres...

When a service or application fails to start with a message like "port already in use" or "addres...

If you're seeing a "504 Gateway Timeout" error in Outlook—especially when connecting to Exchange ...

You open Windows Security and see 'Invalid configuration. Permission denied.' This usually means ...

You see error 0x8007016a in OneDrive: 'The path specified is not available' or 'Sync path not fou...

You try to open Outlook and see a message that your data file (.pst or .ost) is locked. Often thi...

If you see "proxy error" or "not connecting" in Microsoft Teams, it usually means the app can't r...