This was adapted very, very, slightly from this original blog post by Daniel Z. Stinson, thank you!

1. Download Office Deployment Tool: https://www.microsoft.com/en-us/download/confirmation.aspx?id=49117
   Extract to a simple path such as c:\Files\Office_Deploy
2. Create share on the folder you created above. I shared the folder named “Office_Deploy” and set “Full Permissions” to “Everyone”
3. Edit the configuration-Office365-x86.xml file to be the following below. Edit line 2 to be the path to your share that you created in the previous step:
   

   <Configuration>
   <Add SourcePath="\\YOURSERVER\Office_Deploy\" OfficeClientEdition="32" >
   <Product ID="O365ProPlusRetail">
   <Language ID="en-us" />
   </Product>
   </Add>
   <!-- <Updates Enabled="TRUE" UpdatePath="\\Server\Share\" /> -->
   <Display Level="None" AcceptEULA="TRUE" />
   <Property Name="SharedComputerLicensing" Value="1" />
   <!-- <Logging Path="%temp%" /> -->
   <!-- <Property Name="AUTOACTIVATE" Value="1" /> -->
   </Configuration>

4. Run the following from an elevated command prompt:

   C:\Files\Office_Deploy>.\setup.exe /download configuration-Office365-x86.xml
   This downloads the installer files/package.

5. Wait for files to download, there is no visual confirmation, but I did see an “Office” folder get created.
6. Run the following from an elevated command prompt:
   C:\Files\Office_Deploy>.\setup.exe /configure configuration-Office365-x86.xml

Enjoy!