Error connecting to the Report Server. The remote server returned an error: (401)

Published: June 5, 2015


Last Updated: 2015-06-05


Applies To




When opening Guard1 Plus Data Maintenance Application, you receive the following error:





NTLM authentication is disabled via group or local security policy. Microsoft SQL Reporting Services requires NTLM authentication.




Follow these steps to enable NTLM authentication.


  1. Log in to the Report Servercomputer as a local administrator.
  2. Search for and open SECPOL.MSC.
  3. In the Local Security Policy console, expand the Local Policies folder in the left pane.
  4. Select the Security Options folder.
  5. On the Local Security Setting tab, click the drop-down and select Allow all.
  6. Click OK.
  7. Close the Local Security Policy console.


Restart the Reporting Services service by following these steps. Note that if this Reporting Services server is running more than just the Guard1 Plus reports, those additional reports will be temporarily unavailable.


  1. On the PC or server that is running Reporting Services, open Administrative Tools..
  2. Open Services..
  3. Browse to the SQL Server Reporting Services service and right-click.
  4. Click Restart.
  5. Close the Services and Administrative Tools windows.














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