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Cross Forest Availability Service in trusted topology - TechNet Articles - United States (English) - TechNet Wiki

Scenario : - For Adatum.com(Source Forest) use4 fiji-r4">

Steps 1:- Start by preparing the two ways Trust between the Forest

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Steps 2 :- This Step will felicitate the free/busy access method that the Availability service uses on the local Client Access server in the source forest (Adatum)

Ø You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Availability Service Permissions" entries in the Client Access Permissions topic.
Ø Need to run this command in source forest (adatum). Run the command given in the below screen shot

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Steps 3 :- This command will give permission to all CAS server in source forest (Adatum), so Availability service can retrieve per-user free/busy information on a CAS server in the target forest (NewORG)

Run the below command in the Target Forest (Neworg)

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Steps 4 :- This command will update a service connection point (SCP) for Autodiscover service pointer on the Client Access server in the source forest for the target Exchange forest.

Need to Run following command in Target forest (Neworg)
Ø $a = Get-Credential (This will prompt for the credentials enter the admin credentials in it for Source Forest (Adatum)

Ø After the command complete successfully you will be able see following service connection point in Source forest Adatum

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Steps 5:-

More Info: - Article In this step we will be creating a mail enabled contact in the source so that we can see the user in the GAL.

Ø We need to create mail enabled contact for Target Forest (neworg) in Source forest (Adatum)
In the example below I have created contact for Bali Singh, Email address :- bali@neworg.com

Steps 6:- To successfully test the Availability service across cross forest.

Now should be able to see free\busy information for Target forest User (neworg)

Note: - To configure bidirectional cross-forest availability, repeat these steps.

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