Hello, our organizations have just merged. We have 2 Active directory forests. In forest A we have Exchange 2010. In forest B we have Exchange 2013.
We would like to be able to start sharing Global address books, availability information, and also share mailboxes if possible. We have some users that work in both organizations. We are only creating mailboxes in one or the other exchange environment for now until we get this figured out.
I have read numerous articles and a few books explaining how this can be done with forests trusts, Federated services, Microsoft Identify Life-cycle management for GAL sync. Each one seems to be geared towards Exchange 2010 or below, or two exchange 2013 environments.
We ultimately will be moving to one forest and one brand new exchange environment, however, because of the complexities with our current forests we need to be able to setup some coexistence in the mean time until we can plan out the new environment.
What tools should we be using to accomplish the following?:
1. Sharing of global address books.
2. Availability information.
3. Sharing or delegation of mailboxes across both exchange orgs.
Thank you.