Match your application's target platform (X86/X64) to the provider version, or use the /passive method to install both. IIS AppPool Crashes
⚠️ The single .exe file is architecture-aware. Running it normally will block installing the “other” architecture if a version is already present.
AccessDatabaseEngine_X64.exe /passive
Install the 32-bit version of the Access Database Engine in addition to any 64-bit version you may have:
Open IIS Manager. Click Application Pools . Select your AppPool and click Advanced Settings . Change Enable 32-Bit Applications to True if using the 32-bit provider, or False if using the 64-bit provider. To help me tailor any further technical steps, let me know: download microsoft.ace.oledb.12.0 provider for both 64-bit
(If you are forcing the 64-bit version instead, type AccessDatabaseEngine_X64.exe /passive )
The definitive guide below explains how to acquire the correct files and bypass Microsoft’s block to run both bitness configurations concurrently. Phase 1: Download the Engine Drivers Match your application's target platform (X86/X64) to the
| Package | Description | Direct Download Link | | :--- | :--- | :--- | | | Supports 64‑bit applications. Use this if your app targets x64. | Download AccessDatabaseEngine_X64.exe | | 32-bit version | Supports 32‑bit applications. Use this if your app targets x86. | Download AccessDatabaseEngine.exe (32-bit) |
Install your primary version (e.g., the 32-bit version) by double-clicking the downloaded .exe file. Follow the on-screen prompts until completion. Force Install the Second Version AccessDatabaseEngine_X64