We know that when we create a Cluster environment between two sites, we must take care about Quorum Witness.
If you need automatic failover SLA in your company, the best way is to separate the (Quorum) FileShare Quitness at a third site. So it is not lost if one of the other two sites has problems.
But, What if you dont have the third site?
Now, It’s possible using Cloud Witness. A new type of Failover Cluster quorum witness with Windows Server 2012 R2.
Follow the link below to an article with steps required to configure it.