Configure the Availability service for cross-forest topology

Configure the Availability service for cross-forest topology:-

This article tells about how to configure freebusy sharing between two Exchange Forests.

You can use the Availability service in cross-forest topologies across trusted or untrusted forests. The type of free/busy information that’s

Exchange Server 2010 Cross Forest Outlook Delegation

To get delegation work between forests we need below prerequisites: –

  • Forest Trust between Forests
  • Cross-Forest Availability Configured
  • GALSYNC configured with either ILM FP1 SP1 or FIM 2010 (or manual cross-forest mail contacts created)
  • Exchange Server 2007 SP1+ and Exchange