When the FT is enabled, you can perform several FT-related operations on the VM:

• Turn Off Fault Tolerance: The secondary VM is deleted, and FT is unconfigured on the primary VM.
• Suspend Fault Tolerance: FT logging is suspended, so the VMs are not in synchronization anymore, but the secondary VM is not removed from the infrastructure.
• Resume Fault Tolerance: Resumes the FT logging after the suspend operation; any changes made to the primary VM will be synced to the secondary VM and standard operations will resume, resulting in continuous synchronization of the primary and secondary VM.
• Migrate Secondary: You can migrate the secondary VM to the different ESXi hosts, for example, in case you need to perform maintenance on the ESXi hypervisor that hosts the secondary VM.
• Test Failover: In this situation, the primary VM is switched between two different hosts and the secondary VM begins the synchronization process from the beginning. This is a non-intrusive test for the primary VM.
• Test Restart Secondary: The secondary VM is stopped and destroyed and the new secondary VM is started and synced with the primary VM.