Due to the fact that it is not recommended to take Active Directory back in time, we recommend that you do not include your Active Directory as part of your DR Replicas but rather allow us to host an Active Directory at the DR site which will be connected to your Existing Active Directory Deployment using IPSec or any other method you might prefer.
/30 = 1 Usable. /29 = 5 Usable.
/28 = 13 Usable. /27 = 29 Usable.
We recommend using the followig method to calculate your DR Storage Requirements in order to sustain an 12 Recovery Point retention.
Total VM Storage x 1.5