The company is implementing XenDesktop globally for desktop virtualization. What is the minimum number of Delivery Controllers that an architect should recommend for high availability?

Citrix best practices recommend deploying a minimum of two Delivery Controllers per site to ensure high availability. This configuration provides fault tolerance, allowing the remaining controller to maintain service if one fails, thus preventing service disruption.

While deploying four controllers increases capacity and redundancy, it is not the minimum number required to achieve basic high availability.

Six controllers provide significant capacity and redundancy, but exceed the minimum requirement for high availability.

Nine controllers offer very high capacity and redundancy, but are far more than the minimum necessary for high availability.