Location: Options > Advanced > Validation
You can specify the following settings:
The default settings are as follows:
Example: You start a backup operation on July 15, at 12.00. The backup version is created at 12.05. Its validation will run at 12.15 if your computer is in the "screen saver" state at the moment. If not, then the validation will not run. In a month, August 15, at 12.15, the validation will start again. As before, your computer must be in the "screen saver" state. The same will occur on September 15, and so on.
You can change the default settings and specify your own schedule. For more information see Scheduling.