unable to sync calendar with outlook in sharepoint 2013 FBA

Hello,

I was trying to sync SharePoint calendar with Outlook. But i am getting the below error message.

Task 'SharePoint' reported error (0x80040102) : 'Outlook cannot connect to the SharePoint List (4PartyURD - Swim Lane Process - tttt). The server may not be reachable from your location. Contact the SharePoint site administrator for more information.  HTTP 301.'

I have tried enabling "Offline synchronization of external list".

From IE settings unchecked "Check for server certificate revocation"

still the behavior is same... any suggestions.

Umesh S