If validation fails for a Live Sync destination VM, the Virtual Machine Status tab in the Job Details dialog box has the value Failure as the Validation Status for the VM.
Note
The boot disk for the source VM must be a local disk (on an ESX datastore that is accessible without a network connection). If the VM uses an iSCSI virtual disk to boot or requires a network connection to access the boot disk, validation fails because the network connection is disabled for validation.
A validation failure can occur simply because the destination VM takes a long time to power on. By default, the maximum time that Live Sync waits for each VM to power on is 20 minutes; but if the destination ESX server is slow or has too many operations running at the same time, a VM might take longer to boot.
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Manually boot the destination VM to determine how long it takes to power on the VM.
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To increase or decrease the time that Live Sync waits for VMs to power on, create the nMinsWaitForBootTimeout additional setting on the VSA proxy used for the Live Sync operation and set the desired timeout value in minutes.