Here is further information from Microsoft about the differences between the 64-bit and 32-bit versions of Outlook:

https://support.office.com/en-us/article/choose-between-the-64-bit-or-32-bit-version-of-office-2dee7807-8f95-4d0c-b5fe-6c6f49b8d261

Instructions on how to install the 32-bit version are also in the above help article.

If you experience any issues, please don’t hesitate to contact us by raising a ticket.