We're pleased to announce the general availability (GA) release of Microsoft OLE DB Driver 19.4.2 for SQL Server. This is a maintenance update to the 19.4 line that improves TLS handling, raises a long-standing connection redirection limit, refreshes the bundled authentication library, and fixes accessibility issues in the UDL dialog.
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The 64-bit MSI continues to install the appropriate binary (x64 or Arm64) automatically based on the OS platform. MSOLEDBSQL 19 installs side by side with MSOLEDBSQL 18.
Prerequisite: the Microsoft Visual C++ Redistributable must be installed before running the driver installer.
What's new in 19.4.2
Features added
| Feature | Details |
|---|---|
| SSL/TLS improvements | Improved SSL/TLS handling for better security and performance. |
| 10 redirects per connection | The driver no longer caps connection redirections at 2, which removes a long-standing failure mode for workloads that hit redirection-heavy topologies (for example, certain Azure SQL routing scenarios). |
Bugs fixed
| Fix | Details |
|---|---|
| UDL accessibility defects | Fixed accessibility issues in the Universal Data Link (UDL) dialog. |
| Updated authentication library | Microsoft SQL Driver Authentication library (mssql-auth.dll) updated to version 1.1.3. mssql-auth.dll is the ADAL replacement introduced in 19.4.1 and is installed as part of the driver setup. |
Supported languages
19.4.2 is available in: Chinese (Simplified), Chinese (Traditional), Czech, English (United States), French, German, Italian, Japanese, Korean, Polish, Portuguese (Brazil), Russian, Spanish, and Turkish. Direct per-language download links are available in the Release notes and the Download page.
Upgrading
If you're on 19.4.1 or earlier in the 19.x line, an in-place upgrade is supported. As always, we recommend validating in a non-production environment first, especially if your application depends on the redirection or TLS behaviors touched in this release.
Feedback
Please file issues and feature requests on the Microsoft OLE DB Driver for SQL Server feedback site or via your usual support channel. Thanks to everyone who reported the UDL accessibility and redirection-limit issues that drove this release.
Microsoft