ARCHIVED: What is the tool that disables LM/NTLMv1, and where can I get it?

This content has been archived, and is no longer maintained by Indiana University. Resources linked from this page may no longer be available or reliable.

Due to security flaws that can allow unauthorized access to restricted resources, UITS has disabled support for the LAN Manager (LM) and NT LAN Manager Version 1 (NTLMv1) authentication protocols. Since certain network resources, such as printing to Residential Technology Center (RTC) printers or mapping network drives, depend on network authentication, you need to run a tool UITS created to configure your computer to disable insecure LM and NTLMv1 authentication protocols. You can obtain this tool free of charge from IUware.

Note:
If your Windows computer is joined to Indiana University's ADS domain, you do not need to run this tool. To see if your computer is joined to the ADS domain:

Windows 10

  1. Search System in the Start menu.
  2. Select System.
  3. On the next screen, under "Computer name, domain, and workgroup settings", look for "Domain:". If you see "ads.iu.edu", your computer is joined to the ADS domain. If not, you may need to run the tool.

    If you see "Workgroup" instead of "Domain:", you may also need to run the tool.

Windows 8.x

  1. Open Desktop mode.
  2. Press Win-c, and then click Settings.
  3. Click PC Info, and the system will display whether or not it is in the ADS domain.

Windows 7

  1. Right-click Computer, located on your desktop or in your Start menu, and select Properties.
  2. On the next screen, under "Computer name, domain, and workgroup settings", look for "Domain:". If you see "ads.iu.edu", your computer is joined to the ADS domain. If not, you may need to run the tool.

    If you see "Workgroup" instead of "Domain:", you may also need to run the tool.

This is document atpi in the Knowledge Base.
Last modified on 2018-01-18 15:44:08.

  • Fill out this form to submit your issue to the UITS Support Center.
  • Please note that you must be affiliated with Indiana University to receive support.
  • All fields are required.

Please provide your IU email address. If you currently have a problem receiving email at your IU account, enter an alternate email address.

  • Fill out this form to submit your comment to the IU Knowledge Base.
  • If you are affiliated with Indiana University and need help with a computing problem, please use the I need help with a computing problem section above, or contact your campus Support Center.

Please provide your IU email address. If you currently have a problem receiving email at your IU account, enter an alternate email address.