Install earlier versions of Office first. See No support for multiple Office versions installed on a machine with Remote Desktop Service (RDS). Running multiple versions of Office on Windows when Remote Desktop Services (RDS) is enabled in not supported. However, if the standalone application isn’t part of the new Office suite you are trying to install, then the standalone application will be left on the machine and the Office suite will successfully install. In this case, the standalone version will be removed. This can happen if you have a standalone Office application (such as Word) installed on your computer, but a newer version of the application is already included in the suite you're trying to install. You may see a 'Stop, you should wait to install Office.' error. See How to use Office 2013 suites and programs (MSI deployment) on a computer that’s running another version of Office.

There is one exception to this: If one of the two products is installed through MSI (which is common for volume licensed products), these two can run side-by-side.

If you have a Microsoft 365 subscription or non-subscription version such as Office Home and Business 2019, 2016 or 2013, in most cases you can't run these versions together on the same computer. Note: If not otherwise stated, the following statements also apply to individual apps such as Visio and Project.

MS Office 2003 Pro Japanese