It was asked by one of our sales people, for me to look into how we can see the Exchange calendar schedules of a business partner of ours. This is a separate company; where they have a different Windows domain and Exchange Servers. The 2 companies are connected via fiber and we already have some static routing rules in place to share an network application database, that is hosted at our facility.
The 2 companies already are connected via fiber and both companies have setup routing rules on our network routers to allow limited access to 1 specific application server. This application server is hosted on our network and the other company maps a drive (with a server local user account and IP address) and installs the software on their network. Static Routing rules are in place to ensure that information from this application is sent back and forth correctly. The other company specifically has 'read-only' access to this application server's database.
But the specific question at hand is how to 'Share' our Exchange calendars and how we can see the other companies calendars as well. These are 2 different Windows domains and Exchange Servers.
We do not want the other company to be able to see our file servers or anything else. Just Exchange Calendars(read-only, not emails.