You can configure LibreOffice to use MS Office formats by default, so that when you save a document in LibreOffice, it will automatically be saved in the MS Office format. Best of all, this is quite easy to configure.
Tips and Tricks How to Save a Libre Office Open Source Text Document in Word Format
The entire configuration is handled in one location and can be reached from any of the LibreOffice tools (Writer, Calc, Impress, Draw, Base or Math). To make LibreOffice switch from saving as the default open formats to the more universally accepted MS Office standard formats, follow these steps:
Open LibreOffice Writer.
Click the gear icon in the top right corner and click Options.
