Which configuration allows a server administrator to adjust iDRAC settings via the front panel?

The configuration that allows a server administrator to adjust iDRAC settings via the front panel is the one that includes an LCD interface. The LCD provides a user-friendly display that allows administrators to interact with the iDRAC settings directly from the front panel of the server. This includes navigating menus, changing settings, and viewing important information without requiring access to remote management tools.

The other options may incorporate some form of display but lack the full functionality necessary for adjusting iDRAC settings. For example, LED indicators typically show system status through colored lights but do not provide interactive features or detailed information. Configurations like LED with Quick Sync 2 may enhance mobile management capabilities but still do not replace the detailed interface provided by an LCD. Therefore, only the LCD configuration supports direct adjustments to iDRAC settings through the front panel effectively.