Merge pull request #4425 from douglaslMS/ssis-scaleout-useany

Added explanation of @useanyworker parameter per email thread.

Author: GitHubber17

docs/integration-services/system-stored-procedures/catalog-create-execution-ssisdb-database.md

@@ -58,8 +58,14 @@ catalog.create_execution [@folder_name = folder_name
  [@runinscaleout =] *runinscaleout*  
  Indicate whether the execution is in Scale Out. Use the value of 1 to execute the package in Scale Out. Use the value of 0 to execute the package without Scale Out. This parameter is optional. If not specified, its value is set to DEFAULT_EXECUTION_MODE in [SSISDB].[catalog].[catalog_properties]. The *runinscaleout* is **bit**. 
 
- [@useanyworker =] *useanyworker*  
-  Indicate whether any Scale Out Worker is allowed to do the execution. Use the value of 1 to execute the package with any Scale Out Worker. Use the value of 0 to indicate that not all Scale Out Workers are allowed to execute the package. This parameter is optional. If not specified, its value is set to 1. The *useanyworker* is **bit**. 
+[@useanyworker =] *useanyworker*  
+Indicate whether any Scale Out Worker is allowed to do the execution.
+
+-   Use the value of 1 to execute the package with any Scale Out Worker. When you set `@useanyworker` to true, any worker whose maximum task count (as specified in the worker configuration file) is not yet reached is available to run the package.
+
+-   Use the value of 0 to indicate that not all Scale Out Workers are allowed to execute the package. When you set `@useanyworker` to false, you have to specify the workers that are allowed to run the package by using Scale Out Manager or by calling the stored procedure `[catalog].[add_execution_worker]`.
+
+This parameter is optional. If not specified, its value is set to 1. The *useanyworker* is **bit**. 
 
  [@execution_id =] *execution_id*  
  Returns the unique identifier for an instance of execution. The *execution_id* is **bigint**.