This article discusses re-enabling the “insecure guest logons” setting in Windows 10, which breaks guest access for SMBV2 protocol. This setting is required to add files to controllers.

Quick Action

If you receive a “You can’t access this shared folder because your organization’s security policies block unauthenticated guest access” error, follow the following steps

  1. Close Composer and any File Explorer windows open
  2. Open the Local Group Policy Editor (gpedit.msc)
  3. Navigate to Computer Configuration > Administrative Templates > Network > Lanman Workstation
  4. Change “Enable insecure guest logons” to “Enabled”  (will likely show disabled)
  5. Close the Local Group Policy Editor
  6. Test with Composer and file explorer windows again
Article Body

Applies to: Windows 10 Professional and Enterprise editions

If you receive a “You can’t access this shared folder because your organization’s security policies block unauthenticated guest access” error when trying to move a file to the controller via Composer or connect to the controller SMB shares, follow this procedure to re-enable guest access.

Steps:

  1. Close Composer and any File Explorer windows open
  2. Open the Local Group Policy Editor (gpedit.msc)
  3. Navigate to Computer Configuration > Administrative Templates > Network > Lanman Workstation
  4. Change “Enable insecure guest logons” to “Enabled”  (will likely show disabled)
  5. Close the Local Group Policy Editor
  6. Test with Composer and file explorer windows again

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