YOu will be able to exchange free/busy information across forests using the new Availability web service in Exchange 2007, but not calendar details. Users can send calendar details (using iCalendar) to either other easily, though, with Outlook 2007.

--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx

"Tom - UofA" discussions.microsoft.com> wrote in message news:AE2C4CFB-EFE4-4693-8A49-23026F6EE847@microsoft.com...

No, you cannot perform delegate tasks across forests. You can, however, use iCalendar to transmit the entire contents of your Calendar folder (or a date range).

--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx

"Tom - UofA" discussions.microsoft.com> wrote in message news:5B3FF835-A844-4D66-A385-8BA68CA707B2@microsoft.com...

Is it possible to use SharePoint or some other technology (other than MS
Office Online) to share calendars across AD forests? We have a need for our
team to be able to use individual calendars, then aggregate all these
calendars into a team calendar. Ideally we would like to able to view
different members of the team either side by side or overlaid, as is the case
with Outlook Shared Calenders.

Is this possible, given that some of out team members are outside of our
main AD forest? We do have access to SharePoint 2007.

Chris

"Sue Mosher [MVP-Outlook]" wrote: