Specify maximum log file size

Supported OS tags: Windows10, Windows10RT, Windows11, Windows7, Windows8, Windows81, WindowsRT, WindowsRT81, WindowsServer2003, WindowsServer2008, WindowsServer2012, WindowsServer2012R2, WindowsServer2016, WindowsVista

This policy setting specifies the maximum size in bytes of the log file netlogon.log in the directory %windir%\debug when logging is enabled. By default, the maximum size of the log file is 20MB. If you enable this policy setting, the maximum size of the log file is set to the specified size. Once this size is reached the log file is saved to netlogon.bak and netlogon.log is truncated. A reasonable value based on available storage should be specified. If you disable or do not configure this policy setting, the default behavior occurs as indicated above.

• Computer
  Allow cryptography algorithms compatible with Windows NT 4.0

  At least Windows Vista
• Computer
  Contact PDC on logon failure

  At least Windows Server 2003 operating systems or Windows XP Professional
• Computer
  Log Enhanced Domain-wide NTLM Logs

  At least Windows 11 Version 24H2
• Computer
  Set Netlogon share compatibility

  At least Windows Server 2003
• Computer
  Set scavenge interval

  At least Windows Server 2003 operating systems or Windows XP Professional
• Computer
  Set SYSVOL share compatibility

  At least Windows Server 2003
• Computer
  Specify expected dial-up delay on logon

  At least Windows Server 2003 operating systems or Windows XP Professional