Anyone know which versions of Microsoft Office are compatible with Mojave,10.14.6?

Right now, if you have the retired MS Office 2008/2011/2016 suites already installed where they are supported, you can continue to use them without further updates or Microsoft support. Any new installation of these Microsoft Office suites on the same or different Mac hardware will be blocked by Microsoft.

So, unless you have macOS Catalina (presently) or later, you cannot install the current Microsoft 365, or Office 2019/2021 for Mac suites.

Microsoft admitted just before High Sierra (10.13.6) was released that they did not test Office 2011 for Mac on it, and Office 2011 for Mac was retired and unsupported on 7 Oct 2017.

You are correct that Microsoft only supports the current (Ventura) and the previous two operating systems, though they are on the cusp of changing that minimum requirement from Catalina to Big Sur (and later).

Microsoft has deactivated their license servers for their retired products and that means you won't be able to install and license new installations of Office 2011 or 2016 for Mac on any operating system. Microsoft only supports new installations of Microsoft 365 (subscription) or Office 2019/Office 2021 for Mac (single purchase) on paragraph 2 operating systems. There will be a very limited time window where you can install these on Catalina.

TurksCap Said:

"Anyone know which versions of Microsoft Office are compatible with Mojave,10.14.6? I just upgraded to Mojave, might move to Catalina on my Late 2014 iMac but no further."

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MS Office and Mojave:

A. 32-bit Incompatibility:

You likely have the 32-bit version installed. 64-bit is what you need.  Catalina is 64-bit; 32-bit applications will not run on it. So, contact Microsoft, asking for a new install key for 64-bit. Use 2019 for Mojave. Use 2021 for Catalina.

B. Contact Microsoft Via Chat:

Start Here:  Microsoft Contact Us Virtual Agent - Microsoft Support. Perform a chat session with Microsoft using a computer, as it would be more user-friendly doing so.

Mojave is the last operating system to support 32-bit and 64-bit applications. Reread my post about what happens when you attempt to install any currently unsupported Microsoft Office suite on operating systems older than Catalina. At the very moment, Office 2019/2021 for Mac will install in Catalina, but as soon as Microsoft makes Big Sur the minimum supported operating system, installation capability ends, and all MS Office updates cease on Catalina.

One alternative is to forget about Microsoft and test drive Softmaker's Office 2021 product which is still supported on High Sierra and later. Softmaker's product is a clone of MS Office and natively opens and saves MS documents with a familiar interface. Read over the different implementations of their Office 2021 to determine the features you need prior to purchase. Alternatively, there is the free LibreOffice Suite that will be supported on High Sierra until Feb 2023, when the minimum operating system for LO updates will become Mojave.

TurksCap Said:

"Microsoft informs me that they will only sell MS Office 2021 and it will only run on Big Sur, Monterey and Ventura."

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Get an Older Version on Amazon. It would likely be mailed to you in a card.

VikingOSX Said:

“Even if one could get an older (retired) version of Office from Amazon/Ebay, when one attempts to install it on an operating system older than Catalina, Microsoft intervenes and one can never license it.”

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Based on Personal Experience:

I purchased what was labeled 2019 Microsoft Office for Mac from a local retailer. Silly code ended up being for 2008! With a verified proof of purchase, Microsoft is kind enough to make the upgrade.

As for Virtual Machines, get a version that is compatible with the version of the Operating System you’re using.

Thx, that’s a good alternative. I just found the following link to older versions of office. We can download and install these older but unsupported versions.

https://learn.microsoft.com/en-us/officeupdates/update-history-office-for-mac

Look into the Free LibreOffice, it handles MS Office files like Word & Excel, & Page Layout…

https://www.libreoffice.org/

Even if one could get an older (retired) version of Office from Amazon/Ebay, when one attempts to install it on an operating system older than Catalina, Microsoft intervenes and one can never license it.