To enable diagnostic logging for Defender AD FS Adapter:
On a computer where Defender AD FS Adapter is installed, create the following value in the HKEY_LOCAL_MACHINE\SOFTWARE\One Identity\Defender\AD FS Adapter registry key using the Registry Editor:
Value type: REG_DWORD
Value name: Diagnostics
Value data: 1
The path to the log file: %ProgramData%\One Identity\Defender\Diagnostics\AD FS Adapter
File name for Adapter: DefenderAdapter.log
File name for Configuration tool: Configuration.log
To disable diagnostic logging for Defender AD FS Adapter, delete the Diagnostics value from the Defender AD FS Adapter registry key or set the value data to 0.