Hello Stuart,
The thing is currently in Adaxes we have a limitation of 10 minutes, during which a PowerShell script should complete. If a script fails to complete within 10 minutes, the operation is cancelled. Currently there is no setting or configuration entry that you can use to increase the time limit.
It is quite strange that a PowerShell script cannot complete in 10 minutes. 10 minutes in more than enough for a PowerShell to complete. Probably, the best way to resolve this issue would be to optimize the script. Can you describe what the script does or send the script to our support email (adaxes@softerra.com)?