Using Classic Outlook on Windows for personal email, calendar, and contact management
To install the 32-bit version of Office on a Windows PC, use one of these supported methods.
- If installing from Microsoft 365/Office portal (click-to-run)
- By default, the 64-bit version is installed unless 32-bit is explicitly chosen before starting.
- When starting the install, look for the option to choose 32-bit vs 64-bit and select 32-bit before downloading/running the installer.
- Then follow the normal installation steps described in the Office install guide: see "Install Office on a PC" in the article Download and install or reinstall Microsoft 365 or Office 2024 on a PC or Mac.
- If a different bitness of Office is already installed (for example, 64-bit) it must be uninstalled first before installing 32-bit. See the note in the same article about the "Office (64-bit or 32-bit) couldn't be installed" error.
- If using the Office offline installer (Microsoft 365 Apps for business/enterprise)
- Use the Office Deployment Tool with a configuration file that specifies 32-bit.
- Example configuration (from Notepad) for Microsoft 365 Apps for enterprise:
<Configuration> <Add OfficeClientEdition="32"> <Product ID="O365ProPlusRetail"> <Language ID="en-us" /> </Product> </Add> </Configuration> - Save this XML file and use it with the Office Deployment Tool to download and install the 32-bit edition as described in the offline installer article.
- When 32-bit Office is required
- 32-bit Office is required on:
- 64-bit Windows 10 with ARM-based processor
- 32-bit operating system with x86 processor
- Devices with less than 4 GB RAM
- 32-bit Office is also recommended if there are 32-bit COM add-ins or 32-bit controls with no 64-bit alternative, or VBA code that depends on 32-bit-only APIs.
If 64-bit Office is already installed and 32-bit is needed instead, uninstall the existing Office first, then reinstall choosing the 32-bit option.
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