Hi Team, We have used FIM2010 and performed GAL sync of two untrusted forest (Exch 2007 & Exchange 2010) Now we need to view free/busy info of both forests. I have refered technet articles and found availability addressspace needs to be configured in both the forests. Please guide me configuring Availability services configuration to be done in both forests. In forum and few technet articles i have seen the below steps need to be done. 1. configure Cross forest AV services on source forest Add-AvailabilityAddressSpace -ForestName "xyz.com" -AccessMethod OrgWideFB -UseServiceAccount $true on Target Get-ClientAccessServer | Add-AdPermission -AccessRights ExtendedRight -ExtendedRights "ms-exch-epi-token-serialization" -User "Sourceforest\Exchange Servers" 2.export the self-signed certificate or the root CA certificate, you will import it into the computer account store on each Exchange 2007 Client Access server. Do i need to run the cmdlets in both forests for getting free/busy information from both directions. Will these two enough to retrieve free/busy info. Kindly suggest Ahmed Ali

The above will only with when a Trust is configured between the two domains. See the section "Use the Shell to configure organization-wide free/busy information in an untrusted cross-forest topology" in Configure the Availability Service for Cross-Forest Topologies As far as I know, you need to have Autodiscover configured. In other words, autodiscover.source.com must be available for the target and of course, you would need to have that name in the certificate in Source. (and vice versa for the target domain) Martina Miskovic

The above will only with when a Trust is configured between the two domains. See the section "Use the Shell to configure organization-wide free/busy information in an untrusted cross-forest topology" in Configure the Availability Service for Cross-Forest Topologies As far as I know, you need to have Autodiscover configured. In other words, autodiscover.source.com must be available for the target and of course, you would need to have that name in the certificate in Source. (and vice versa for the target domain) Martina Miskovic

Thanks Martina, From the technet article we need to run the below command in an untrusted forests. As we have exchange 2007 in one forest and 2010 in other, do we need to run the same shell cmdlet in both forests. Please suggest. Set-AvailabilityConfig -OrgWideAccount "Contoso.com\User" $a = get-credential (Enter the credentials for organization-wide user in Contoso.com domain) Add-AvailabilityAddressspace -Forestname Contoso.com -Accessmethod OrgWideFB -Credential:$a Ahmed Ali