# Prerequisties for migrating SQL Server AlwaysOn databases to AWS


The following prerequisites are required to complete this walkthrough:
+ Understand how to work with Microsoft SQL Server as a source for AWS DMS. For information about working with SQL Server as a source, see [Using a SQL Server Database as a Source](https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Source.SQLServer.html).
+ Understand how to work with SQL Server Always On availability groups. For more information about working with SQL Server Always On availability groups, see [Working with SQL Server Always On availability groups](https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Source.SQLServer.html#CHAP_Source.SQLServer.AlwaysOn) 
+ Understand how to run prerequisite tasks for AWS DMS, such as setting up your source and target databases. For information about prerequisites for AWS DMS, see [Prerequisites](https://docs.aws.amazon.com/dms/latest/userguide/CHAP_GettingStarted.Prerequisites.html).
+ Understand the supported features and limitations of AWS DMS. For information about AWS DMS, see [What Is Database Migration Service?](https://docs.aws.amazon.com/dms/latest/userguide/Welcome.html).

For more information about AWS DMS, see the [Database Migration Service user guide](https://docs.aws.amazon.com/dms/latest/userguide/CHAP_GettingStarted.html).