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This permission controls whether a user can set a sheet's update schedule to "Realtime". Users without this permission will only be able to create exports that are updated manually. By default, any logged in user has this permission.
Excel Online Integration - Export JSM Customer Data
This permission controls whether a user can export JSM user and organization data. By default, no user has this permission. In addition, the functionality also has to be enabled under Apps > Excel Online Integration > Configuration > Additional Export Tab Options > JSM Customers, which needs to be switched on.