With the release of Exchange 2010 SP1, we introduced the /hosting mode switch – a feature which deploys Exchange using an Active Directory structure that affords complete separation between tenant ...
Updated Jul 01, 2019
Version 2.0
Blog Post
Our guidance will be out very soon, don't worry, and @ Jatin specifically, the amount of time it takes to migrate or transition is going to be dependant on how complex the environment is. Most successful Exchange deployments and migrations have a heavy dose
of planning in them. Many of those that don't end up calling in for support.
The British army even have a phrase for it (though I have removed one of the 7 P's as this is a family show): Proper Planning and Preparation Prevents Poor Performance -
http://en.wikipedia.org/wiki/7_Ps_(military_adage)
en.wikipedia.org/.../7_Ps_(military_adage)