Hi

We are migrating an Exchange 2007 Forest and a separate Exchange 2010 Forest to a new 2013 Exchange organisation.

I have a query to know if using the prepare-Moverequest.PS1 script, once a new  Mail Enabled User is created in the new Exchange 2013 environment will this provide Free\Busy sharing across organisations?  In addition to the script the aim is to also configure the Availability Service and also move the SCP. Is this enough to achieve Free/Busy?

I have read that it is possible and then I have read some articles that say you also need to use a Sync Agent or Federation Gateway? 

Any help would be great

Hi,

As far as I know, we must ensure sync the Global Address List (GAL) between forests, autodiscover service must be working between forests and all Client Access Servers must validate the certificate on the target forest.
For Exchange 2007, we have two option to configure Autodiscover:
1. If there's a trust relationship between the two forests, you can export the Service Connection Point (SCP) from the target to the source forest.
2. Use DNS to resolve the (default AutoDiscover) FQDN autodiscover.targetforest.com.
For Exchange 2010, we can use sharing policies to share users' calendar with free/busy information and contact information with users in external federated organizations.

Heres an blog about How to Configure the Availability Service for Cross-Forest Topologies, for your reference:
http://blogs.technet.com/b/exchange/archive/2011/03/04/3412075.aspx

Thanks

Allen

Thanks for the reply

This is what I thought, that a Sync tool must be used.  I was hoping that creating the MEU in the target would provide Free\Busy information without additional expense?  As I have read that a MEU created in the target forest will provide this information?

Thanks