Downloading and installing Microsoft 365 (formerly Office 365) via an is the most reliable way to set up the software when dealing with limited bandwidth or multiple computer deployments. While the standard installation uses a small "stub" file that streams data during setup, the offline method allows you to download the full installation package once and use it anytime without an active connection. Official Methods for Office 365 Offline Download

Now that the files are on your hard drive, you can install Office without an internet connection.

Before you begin, ensure you have the following:

<Configuration> <Add SourcePath="C:\ODT\Office" OfficeClientEdition="64" Channel="Current"> <Product ID="O365ProPlusRetail"> <Language ID="en-us" /> </Product> </Add> </Configuration>