SMB-SSL VPN error: Clock is out of sync with Active Directory server

When SRA time is not synchronized with AD, user will not be able to login to the portal. SRA Logs shows: Clock out of sync with AD server.Error at user end: System clock is out of sync with Active Directory. Please contact your administrator.

Please navigate to System ->Time. Under NTP settings-> NTP server1 :Add the AD server IP. Change the update interval to 60 sec. Now user will be able to login.