**To modify a replication instance**

The following ``modify-replication-instance`` example modifies a replication instance so that it uses a Multi-AZ deployment. ::

    aws dms modify-replication-instance \
         --replication-instance-arn arn:aws:dms:us-east-1:123456789012:rep:T3OM7OUB5NM2LCVZF7JPGJRNUE \
         --multi-az

Output::

    {
        "ReplicationInstance": {
            "ReplicationInstanceIdentifier": "my-repl-instance",
            "ReplicationInstanceClass": "dms.t2.micro",
            "ReplicationInstanceStatus": "available",
            "AllocatedStorage": 5,
            "InstanceCreateTime": 1590011235.952,

            ...output omitted...

            "PendingModifiedValues": {
                "MultiAZ": true
            },
            "MultiAZ": false,
            "EngineVersion": "3.3.2",
            "AutoMinorVersionUpgrade": true,
            "KmsKeyId": "arn:aws:kms:us-east-1:123456789012:key/f7bc0f8e-1a3a-4ace-9faa-e8494fa3921a",

            ...output omitted...

        }
    }

For more information, see `Working with an AWS DMS Replication Instance <https://docs.aws.amazon.com/dms/latest/userguide/CHAP_ReplicationInstance.html>`__ in the *AWS Database Migration Service User Guide*.