Microsoft® has announced that after July 9, 2019, they will no longer be offering extended support for Microsoft® SQL Server® 2008 R2. Many unsupported versions of Act! still run on Microsoft SQL Server 2008 R2, which means that after July 9, 2019, they will no longer receive key security updates from Microsoft. Continuing to run Microsoft SQL Server 2008 R2 past this date may put systems and applications at an increased risk of potential security vulnerabilities.
To avoid possible security threats, we recommend users of these legacy versions upgrade to the latest version of Act!, which includes Microsoft SQL Server 2014. To support impacted Act! customers in avoiding security and incompatibility issues, promotional pricing is available until June 28, 2019.
The Act! versions released with Microsoft SQL Server 2008 R2 are as follows:
Earlier versions of Act! used SQL 2005 or older, which was deprecated in 2013. For more information on this Microsoft announcement, please review the following link: https://support.microsoft.com/en-us/help/4456242/end-of-support-for-sql-server-2008-and-sql-server-2008-r2
It should be noted that you could have a newer version of Act! and still be using SQL2008, as frequently the "upgrade" process leaves the existing versions of SQL installed if it's deemed to be compatible.