Login to the SoftNAS UI and launch the Snapreplicate Applet

Next, click on action then Replicate now and make sure that all volumes are in a "SNAPREPLICATE-COMPLETE"

Next, Deactivate SnapHA

From here you can stop SoftNAS using two different methods:

a. You can run the commands below from SoftNAS CLI 
                                                #  sync; sync; shutdown -h now 

b. From the platform (AWS/Azure console) 

Done

From the cloud provider (AWS/Console) you can start the HA pair simultaneously starting with the Primary node. The restart usually takes 3-5 minutes for the systems to be fully up.

Next, Once the systems are up and you are logged in; navigate to the SnapHA applet and ensure that HA is still in a deactivated state and all volumes are in a "SNAPREPLICATE-COMPLETE" state

Click on the action Menu --> Activate and click Yes on the popup menu to confirm.

Once HA is fully activated again it should look like the screenshot below. 

Done