Hi, I want to share calanders between two domains, so I created a Exchange 2010 federation between these two domains. The federation (and the organizaion relationship) seems to be fine, but I have one simple question. How do I open in Outlook a shared calender from a user residing in the other domain? Here I'm stuck. I followed the guideline here but it's not described how to use it in outlook then: http://www.expta.com/2011/07/how-to-configure-exchange-2010-sp1.html Thanks in advance, Sven

Hi You could have a look on the below article http://technet.microsoft.com/en-us/library/dd638083.aspx As it said : "Federated delegation offers two ways for users to share calendar and contact information with external recipients: Organization relationships and sharing policies." Hope it helps CheersZi Feng TechNet Community Support

Hi You could have a look on the below article http://technet.microsoft.com/en-us/library/dd638083.aspx As it said : "Federated delegation offers two ways for users to share calendar and contact information with external recipients: Organization relationships and sharing policies." Hope it helps CheersZi Feng TechNet Community Support