If the Windows Time Service group policy settings have been applied to this domain controller, configure the MaxPosPhaseCorrection ...

If the Windows Time Service group policy settings have been applied to this domain controller, configure the MaxPosPhaseCorrection group policy setting to a decimal value of 172800 (48 hours). If the Windows Time Service group policy settings have not been applied to this domain controller, set the value of registry key HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\W32Time\\Config\\MaxPosPhaseCorrection to a decimal value of 172800 (48 hours).