Essentially:


1.Log on to a Windows Server 2008-based domain controller.

2.Click Start, click Run, type gpmc.msc, and then click OK.

3.In the Group Policy Management console, expand Forest: DomainName, expand DomainName, expandDomain Controllers, right-click Default Domain Controllers Policy, and then click Edit.

4.In the Group Policy Management Editor console, expand Computer Configuration, expand Policies, expandAdministrative Templates, expand System, click Net Logon, and then double-click Allow cryptography algorithms compatible with Windows NT 4.0.

5.In the Properties dialog box, click the Enabled option, and then click OK.