Customers can now enable multiple authentications protocols at the same time for an Amazon Aurora PostgreSQL-Compatible Edition cluster. Amazon Aurora with PostgreSQL compatibility supports both Kerberos authentication with Microsoft Active Directory (AD) and IAM database authentication , but in the past you could choose only one for a given cluster. Now, Amazon Aurora with PostgreSQL compatibility supports enabling Kerberos and IAM authentication for a cluster simultaneously. For example, customers can enable IAM for authenticating AWS Lambda and enable Kerberos for other authentication situations.