Hi to all, first, I'd like to apologize for my english. I set up a new sharepoint2010 foundation environment. After a long way, it is now working well. But there is one open item. When trying to synchronize a calendar from sharepoint (SP) into outlook, to use both calendar, there is an error: If using Outlook 2007 + Win7: Error 0x8000FFFF If using Outlook 2010 + Win7: Error 0x80040102 If using WinXP, everything is working correctly. I'm using an official certificate for access over the internet and in the LAN. In Internet Explorer, under Advanced, unchecking the option "check server certificate revocation", everything is working under Win7, too. I learned, that there is a change coming up with vista for checking certificates with CRL and OCSP. Has anyone an idea, how to solve the problem, without deactivating the revocation check, because that means an security hole? Thanks in advance Frank

Hi Frank, Here is a similar issue, please check out the following thread which may help you( check out _cannan_ and Savoeurn Va -MSFT's reply): http://social.technet.microsoft.com/Forums/en/sharepointadmin/thread/07e50247-2234-4ff2-83b3-5bbd9cf8744e Thanks, Lhan Han