# EnableInstanceSqlHaStandbyDetections
<a name="API_EnableInstanceSqlHaStandbyDetections"></a>

Enable Amazon EC2 instances running in an SQL Server High Availability cluster for SQL Server High Availability instance standby detection monitoring. Once enabled, Amazon monitors the metadata for the instances to determine whether they are active or standby nodes in the SQL Server High Availability cluster. If the instances are determined to be standby failover nodes, Amazon automatically applies SQL Server licensing fee waiver for those instances.

To register an instance, it must be running a Windows SQL Server license-included AMI and have the Amazon Systems Manager agent installed and running. Only Windows Server 2019 and later and SQL Server (Standard and Enterprise editions) 2017 and later are supported. For more information, see [ Prerequisites for using SQL Server High Availability instance standby detection](https://docs.amazonaws.cn/sql-server-ec2/latest/userguide/prerequisites-and-requirements.html).

## Request Parameters
<a name="API_EnableInstanceSqlHaStandbyDetections_RequestParameters"></a>

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see [Common Query Parameters](CommonParameters.md).

 **DryRun**   
Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is `DryRunOperation`. Otherwise, it is `UnauthorizedOperation`.  
Type: Boolean  
Required: No

 **InstanceId.N**   
The IDs of the instances to enable for SQL Server High Availability standby detection monitoring.  
Type: Array of strings  
Array Members: Minimum number of 1 item. Maximum number of 30 items.  
Required: Yes

 **SqlServerCredentials**   
The ARN of the Amazon Secrets Manager secret containing the SQL Server access credentials. The specified secret must contain valid SQL Server credentials for the specified instances. If not specified, deafult local user credentials will be used by the Amazon Systems Manager agent. To enable instances with different credentials, you must make separate requests.  
Type: String  
Pattern: `^(?=.{20,2048}$)arn:aws[a-z-]*:secretsmanager:[a-z0-9-]+:\d{12}:secret:[a-zA-Z0-9/_+=.@-]+`   
Required: No

## Response Elements
<a name="API_EnableInstanceSqlHaStandbyDetections_ResponseElements"></a>

The following elements are returned by the service.

 **instanceSet**   
Information about the instances that were enabled for SQL Server High Availability standby detection monitoring.  
Type: Array of [RegisteredInstance](API_RegisteredInstance.md) objects

 **requestId**   
The ID of the request.  
Type: String

## Errors
<a name="API_EnableInstanceSqlHaStandbyDetections_Errors"></a>

For information about the errors that are common to all actions, see [Common client error codes](errors-overview.md#CommonErrors).

## See Also
<a name="API_EnableInstanceSqlHaStandbyDetections_SeeAlso"></a>

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/EnableInstanceSqlHaStandbyDetections)