In each project or subproject, it is always advised to carefully plan using best practices, depending on the type of implementation or migration that you require.
You will need to know the core functions and capabilities of Exchange and its requirements.
The best way to start is to use the Microsoft Exchange Server Deployment Assistant. This tool is an effective way to start the planning of your project. It is available at https://technet.microsoft.com/en-us/office/dn756393.aspx. As shown in the following screenshot, it supports several scenarios:
Exchange Server Deployment Assistant is a tool that was developed to help the implementation of Exchange scenarios, either on-premises, cloud, or hybrid. This tool asks you a few questions within the scenario that you have in place or your future scenario, and it will give you a checklist of the tasks you must...
