Features not supported and features with limited support

Backing up to Microsoft Azure Blob Storage

Buffer pool extension

Custom password policies

Data Quality Services

Database Log Shipping

Database snapshots (Amazon RDS supports only DB instance snapshots)

Extended stored procedures, including xp_cmdshell

FILESTREAM support

File tables

Machine Learning and R Services (requires OS access to install it)

Maintenance plans

Performance Data Collector

Policy-Based Management

PolyBase

Replication

Resource Governor

Server-level triggers

Service Broker endpoints

Stretch database

TRUSTWORTHY database property (requires sysadmin role)

T-SQL endpoints (all operations using CREATE ENDPOINT are unavailable)

WCF Data Services

Distributed queries/linked servers. For more information, see Implement linked servers with Amazon RDS for Microsoft SQL Server.

Common Runtime Language (CLR). On RDS for SQL Server 2016 and lower versions, CLR is supported in SAFE mode and using assembly bits only. CLR isn't supported on RDS for SQL Server 2017 and higher versions. For more information, see Common Runtime Language Integration in the Microsoft documentation.

Link servers with Oracle OLEDB in Amazon RDS for SQL Server. For more information, see Support for Linked Servers with Oracle OLEDB in Amazon RDS for SQL Server.

Suspend database for snapshot

External Data Source

Backup and restore to S3 compatible object storage

Object store integration

TLS 1.3 and MS-TDS 8.0

Backup compression offloading with QAT

SQL Server Analysis Services (SSAS)

Database mirroring with Multi-AZ deployments. SQL Server Always On is the only supported method with Multi-AZ deployments.