Hi all, company A and companyB merged and forest trust built and they share the GAL through IIFP and two different exchange organizations (Exch03 and Exch07) Can company A user sharea calendar with company B user? Thank you.

Not with the IIFP but they can with the INTERORG tool. Google and download that and you're good to go. "janeHHH" wrote in message news:00551bc7-91f9-4066-9d0a-9db0b79295b5... Hi all, company A and companyB merged and forest trust built and they share the GAL through IIFP and two different exchange organizations (Exch03 and Exch07) Can company A user sharea calendar with company B user? Thank you. Mark Arnold, Exchange MVP.

I believe the InterOrg tool is just for Free/Busy. You will not be able to use it to access a calendar in the other org. Here are some links on using the InterOrg tool with Exch 2007 and 2003: http://technet.microsoft.com/en-us/library/dd421856(EXCHG.80).aspx http://geekswithblogs.net/BWCA/archive/2010/02/24/using-the-exchange-2003-interorg-tool-with-exchange-2007.aspx http://msexchangeteam.com/archive/2008/12/04/450228.aspxTim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

"Some of the more advanced features, such as delegating mailbox access and viewing calendars, are not available if users are in different forests” ----------Refer to <Planning to Deploy Exchange in a Multiple Forest Environment> Per my knowledge, company a user can’t share calendar with company b user Workaround: If you are using outlook 2007, the calendar can be published to internet, and then share to person in another company, but with read-only permission. Please view the articles below: Internet Calendars for Microsoft Office Outlook 2007 Notes: Federation feature can accomplish the calendar sharing across forest in exchange 2010James Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com