If you simply want to write code against Outlook 16.0:
Third-party DLL sites often distribute malware or incorrect versions Learn.microsoft.com .
The Microsoft.Office.Interop.Outlook NuGet package contains interop assemblies for Outlook 2010, 2013, 2016, and 2019. This is the and ensures version compatibility.
| Error | Likely Cause | Fix | |-------|--------------|-----| | “Cannot find Microsoft Outlook 16.0 Object Library” | Office missing or corrupt | Install/repair Office | | “Class not registered” | Office install issues | Run Regsvr32 on outlvba.dll (found in Office root) | | “Error loading MSOUTL.OLB” | Reference path broken | Remove and re-add the reference |
The is a COM (Component Object Model) library that allows external applications, such as Excel or Access, to control and interact with Outlook features via VBA or other programming languages. It is not available as a standalone download ; instead, it is bundled with the installation of Microsoft Office 2016, Office 2019, or Microsoft 365. Key File Information
