# Create a maintenance window from the Systems Manager console for AMS Accelerate
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To create an AMS Accelerate maintenance window from the Systems Manager console, follow these steps:

1. In the left navigation bar in the **Change management** area, click **Maintenance Windows**, and then click **Create Maintenance Window** at the top right of the screen. Fill in the form. For details on any of the options, see [Create a maintenance window (console)](https://docs.aws.amazon.com/systems-manager/latest/userguide/sysman-maintenance-create-mw.html). When finished, click **Create maintenance window**.

   The maintenance windows list page opens.

1. Select the newly created maintenance window.

   The maintenance window details page opens.

1. Go to the **Targets** tab and choose **Register target**.

   The **Register target** page opens.

1. Add your Accelerate target. For information on targets, see [Assign targets to a maintenance window (console)](https://docs.aws.amazon.com/systems-manager/latest/userguide/sysman-maintenance-assign-targets.html). When finished, click **Register target**. Make note of the target as you need it later.

   The maintenance windows details page reopens on the **Targets** tab with a list including the new target.

1. On the **Tasks** tab of the maintenance window details page, choose **Register Task**, and then pick **Register Automation task** from the drop-down list. Fill in the form. Accelerate notes:
   + Provide a meaningful task name. For example: AcceleratePatch.
   + In the **Automation document** area click in the search box, choose **Owner**, then **Shared documents**.
   + Select the automation document by clicking in the search box and choosing **Document name prefix** --> ** Equals** and then typing: **AWSManagedServices-PatchInstance**. Then select the **AWSManagedServices-PatchInstance** document by selecting its radio button.
   + Under document version, choose **Default version at runtime**.
   + In the **Targets** section: 
     + Set **Target by:** to **Selecting registered target groups**.
     + In the list of targets, select the target you registered in the **Targets** tab.
   + In the **Input parameters** section, fill in the form.
     + **InstanceId**: `{{TARGET_ID}}`
     + **StartInactiveInstances**: `True` to start the instances if they are stopped during the patch maintenance window.
**Note**  
The **InstanceId** parameter value is case sensitive and the **StartInactiveInstances** parameter value can be either True or False.  
Stopped instances cannot be started when targeted by tags. For more information, see [No Invocations to Execute](https://aws.amazon.com/premiumsupport/knowledge-center/ssm-no-invocations-automation).
   + In the **Rate control** section, choose percentages. AMS Accelerate recommends **100%** for **Concurrency** and **100%** for **Error threshold** to attempt to patch all instances simultaneously, regardless of automation errors. If you wish to patch half your targets at a time, for example, to keep a half of the target instances behind a load balance running, set **Concurrency** to 50%.
   + In the **IAM service role** section,choose **Use a custom service role**, then choose the **ams\$1ssm\$1automation\$1role**.

   Click **Register Automation task**.

   The patching maintenance window is created. Under the **Description** tab, you can see the **Next execution time**.