From Setup > TestNav Configurations, open the task list and select Create / Edit TestNav Configurations and click Start.
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Select Create Configurations. Enter the details of any proctor caching computers that you will use to precache tests.
For more information about the Response File Backup Locations, see Configure Response File Backup Locations.
Select Precaching Computer Override to avoid interruption during testing.
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Select TestNav Blacklist Override to disable the blacklist applications usage during testing.
Click Create. When creating test sessions, use the TestNav configuration.