AEM Forms Data Integration allows you to configure and connect to disparate data sources. The following are supported out-of-the-box. However, with little customization, you can integrate other data sources as well.
Relational databases - MySQL, Microsoft SQL Server, IBM DB2, and Oracle RDBMS
This video walks through a workflow showing how AEM Forms can work with Microsoft Dynamics as a back-end data source to deliver interactive, personalized communications.
This feature is available only with AEM 6.3 FP1 and onwards. Be sure to install the AEM Forms add-on before setting up.