The "Microsoft.ACE.OLEDB.12.0" (Access Connectivity Engine OLE DB) is a database driver from Microsoft. Its core function is to facilitate data transfer between non-Microsoft Office applications and popular Office file formats. It allows programs (written in C#, VB.NET, Python, etc.) to read from and write to:
Run the installer normally:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Common\FilesPaths to prevent version conflicts. SQLServerCentral Verification To confirm the 64-bit provider is correctly registered: : Create a new text file, rename its extension to , and double-click it. Under the
Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\MyWorkbook.xlsx;Extended Properties="Excel 12.0 Xml;HDR=YES;IMEX=1"; download microsoft.ace.oledb.12.0 provider for both 64-bit
This is the most stable redistributable package supporting both 32-bit and 64-bit systems. Visit the official Microsoft Download Center.
By default, this installer detects your operating system’s architecture and installs the matching provider. However, if you need to support both 32-bit and 64-bit applications on the same machine (e.g., 64-bit SQL Server SSIS using a 32-bit Excel driver), you must use the silent install method.
If your app is , use the AccessDatabaseEngine_X64.exe . If your app is 32-bit , use the AccessDatabaseEngine.exe . The "Microsoft
Microsoft explicitly does not support side‑by‑side installation, and doing so may cause unexpected issues with Office applications. Use this method only in isolated test environments and with a full backup.
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connection.Open();
Suggest alternatives to OLEDB for connecting to Excel files. Share public link
To download the Microsoft.ACE.OLEDB.12.0 provider for a 64-bit environment, you need the Microsoft Access Database Engine 2010 Redistributable . While newer versions like the Microsoft Access Database Engine 2016
with the /passive or /quiet flag: C:\path\to\AccessDatabaseEngine_x64.exe /passive Core Download Links By default, this installer detects your operating system’s
Get the version that is from your system (e.g., if you have 32-bit Office, download the 64-bit engine). 2. Run via Command Prompt Press Win + R , type cmd , and press Enter . Navigate to your download folder.