If logical server under your SAS application server context has a property checked under Load Balancing tab to launch servers via grid then all jobs would use grid. This is usually checked for standard workspace servers so that all the users submitted jobs can utilize the power of grid.
if you have lot of users that use grid then I dont think it's a good option to remove this check. Instead you can configure a seperate application context for few applications that do not want to use GRID.
PS. @AndrewHowell, many thanks for your excellent job with the papers!
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