How to get 64-bit Excel with Office 365 subscription

Hello Clifford C,

Welcome to Microsoft Community.

I am a Microsoft user just like you, I hope you are doing well.

According to Microsoft, "the 64-bit version is installed by default unless Microsoft 365 or Office detects you already have a 32-bit version of Microsoft 365 or Office (or a stand-alone app such as Project or Visio) installed. In this case, the 32-bit version of Microsoft 365 or Office will be installed instead.

To change from a 32-bit version to a 64-bit version or vice versa, you need to uninstall Microsoft 365 first (including any stand-alone Microsoft 365 apps you have such as Project of Visio).

Once the uninstall is complete, sign in again to www.office.com and select Other install options, choose the language and version you want (64 or 32-bit), and then select Install. (See Install Visio https://support.microsoft.com/office/f98f21e3-aa02-4827-9167-ddab5b025710 or Install Project https://support.microsoft.com/office/7059249b-d9fe-4d61-ab96-5c5bf435f281 if you need to reinstall those stand-alone apps).

Find guidance to uninstall: https://support.microsoft.com/office/9dd49b83-264a-477a-8fcc-2fdf5dbf61d8

The information above were obtained from Microsoft support article: https://support.microsoft.com/office/4414eaaf-0478-48be-9c42-23adc4716658

Please let me know if you need more assistance.

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Warm Regards