Starting mid January 2019, the default installation setting for Office Click To Run is switching from 32 bits to 64 bits.
If you (and your end-users) are using the Office 365 portal (https://portal.office.com/OLS/MySoftware.aspx) to install Office Click to Run check the version before starting to install if you are planning to use the 32 bits install (as it used to be the default install option).
