Every time a user installs Confluence with MSSQL he get the following warning:

I searched around our knowledge base and I did not found any know issues on Confluence side when using MSSQL.

I also notice that customers do not try the MSSQL drivers at all, they simply see this miss leading warning and if any thing goes wrong during the setup they think that the problem is the driver.

That warning causes confusion and a bad customer experience during the initial installation.