Office 365 is installed as a 32-bit program on your Windows PC by default.
Microsoft recommends the 32-bit version, even on 64-bit systems, to avoid compatibility issues with third-party add-ons. However, there may be instances when you’d want the 64-bit version, like if you’re using a very large database or worksheet.
If you need the 64-bit version of Office, follow these steps:
Go to Office.com/myaccount and log in using your Microsoft account
Click on the Install Office
NOTE: This example above is for a Microsoft Office 365 Home subscription
Click on Other options
Click on Choose a version dialog box and select Office – 64-bit
Then click on Install
NOTE: If you want to download the full installation file so that it can be installed quickly on other computers, tick Download an offline installerOnce you have downloaded the 64-bit install file, run the downloaded file to setup and complete the installation
Remember that you can’t have both the 32-bit and 64-bit versions of Office installed at the same time. If you already have the 32-bit version installed, you’ll need to uninstall it before installing the 64-bit version. For more details on the differences between the two versions, refer to Microsoft’s documentation.
