Keymgr.dll is a dynamic-link library (DLL) file in the Windows operating system that provides a command-line interface for managing Windows credentials. Windows credentials are used to authenticate users and applications to access various resources, such as network shares, websites, and remote desktop connections. Keymgr.dll allows users to view, add, modify, and delete these credentials without the need for a graphical user interface.

Keymgr.dll is an essential tool for system administrators and power users who want to manage Windows credentials efficiently. By using the command-line interface provided by Keymgr.dll, users can automate credential management tasks, perform bulk operations, and integrate credential management into scripts and batch files.

To access the functionality of Keymgr.dll, you need to use the Windows Command Prompt or PowerShell. Both command-line interfaces provide the necessary commands to interact with Keymgr.dll and manage Windows credentials effectively.

Examples:

1. View all stored credentials:

   • Open Command Prompt or PowerShell.
   • Type the following command and press Enter:

     rundll32.exe keymgr.dll,KRShowKeyMgr

   • A window will open, displaying all the stored credentials.

2. Add a new credential:

   • Open Command Prompt or PowerShell.
   • Type the following command and press Enter:

     rundll32.exe keymgr.dll,KRShowKeyMgr

   • In the window that opens, click on the "Add a Windows credential" button.
   • Enter the necessary details, such as the server address, username, and password.
   • Click OK to save the new credential.

3. Delete a stored credential:

   • Open Command Prompt or PowerShell.
   • Type the following command and press Enter:

     rundll32.exe keymgr.dll,KRShowKeyMgr

   • In the window that opens, select the credential you want to delete.
   • Click on the "Remove" button.
   • Confirm the deletion when prompted.