maxConcurrency

The new MaxConcurrency value you want to specify. MaxConcurrency is the number of targets that are allowed to run this task, in parallel.

Although this element is listed as "Required: No", a value can be omitted only when you are registering or updating a targetless task You must provide a value in all other cases.

For maintenance window tasks without a target specified, you can't supply a value for this option. Instead, the system inserts a placeholder value of 1. This value doesn't affect the running of your task.