Is it possible to install CMN to support Free/Busy lookups to a Exchange 2010 Service Pack 1 enviroment installed using the /hosting switch on setup.com.
This is a known limitation of Exchange 2010 Service Pack 1 Multi-Tenant installations using the /hosting switch when running the installation via setup.com and have been confirmed on the following Microsoft forum http://social.technet.microsoft.com/Forums/en-US/exchange2010hosters/thread/77322e2d-771f-4f8c-8472-e0c3b23419ed.
The Add-AvailabilityAddressSpace powershell command, is not available in this type of installation.