# AutomationExecutionPreview
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Information about the results of the execution preview.

## Contents
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 ** Regions **   <a name="systemsmanager-Type-AutomationExecutionPreview-Regions"></a>
Information about the AWS Regions targeted by the execution preview.  
Type: Array of strings  
Array Members: Minimum number of 1 item. Maximum number of 50 items.  
Required: No

 ** StepPreviews **   <a name="systemsmanager-Type-AutomationExecutionPreview-StepPreviews"></a>
Information about the type of impact a runbook step would have on a resource.  
+  `Mutating`: The runbook step would make changes to the targets through actions that create, modify, or delete resources.
+  `Non_Mutating`: The runbook step would retrieve data about resources but not make changes to them. This category generally includes `Describe*`, `List*`, `Get*`, and similar read-only API actions.
+  `Undetermined`: An undetermined step invokes executions performed by another orchestration service like AWS Lambda, AWS Step Functions, or AWS Systems Manager Run Command. An undetermined step might also call a third-party API. Systems Manager Automation doesn't know the outcome of the orchestration processes or third-party API executions, so the results of the steps are undetermined.
Type: String to integer map  
Valid Keys: `Mutating | NonMutating | Undetermined`   
Required: No

 ** TargetPreviews **   <a name="systemsmanager-Type-AutomationExecutionPreview-TargetPreviews"></a>
Information that provides a preview of what the impact of running the specified Automation runbook would be.  
Type: Array of [TargetPreview](API_TargetPreview.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 50 items.  
Required: No

 ** TotalAccounts **   <a name="systemsmanager-Type-AutomationExecutionPreview-TotalAccounts"></a>
Information about the AWS accounts that were included in the execution preview.  
Type: Integer  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ssm-2014-11-06/AutomationExecutionPreview) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ssm-2014-11-06/AutomationExecutionPreview) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ssm-2014-11-06/AutomationExecutionPreview)