A string that represents the name of a domain. Domain names are unique across the domains owned by an account within an AWS region. Domain names start with a letter or number and can contain the following characters: a-z (lowercase), 0-9, and - (hyphen).
You expand an existing search domain to a second Availability Zone by setting the Multi-AZ option to true. Similarly, you can turn off the Multi-AZ option to downgrade the domain to a single Availability Zone by setting the Multi-AZ option to