It is not common to have ASR without a recovery plan, especially for large environments where you have domain controllers, web servers, SQL Servers, SharePoint Servers, Exchange Servers, and so on.
If there is no recovery plan when failover of the servers to Azure takes place, they will start randomly, and that will affect many machines. For example, if the SharePoint Server starts first without the domain controller and SQL Server up and running, that will cause issues. Therefore, you need to make a recovery plan to specify the dependencies of the machines.
The recovery plan would do the following:
- Specify the machines that would failover together and failback together
- Specify the dependencies between machines so that machines with higher priorities, such as domain controllers, start first.
To create a recovery plan, you have to follow these steps: