To search Microsoft Office files on a Windows machine, we have two option. The first choice is, open File Explorer and enter the file name or portion of the file name on search box as shown below. It automatically displays the result.
The second option is, open Microsoft Office 2016 File (Word or excel or power point)=> Go to File, select Open. Now choose the location where you want to search for the file as shown below.
Double click on any location (here we are searching in a particular folder), it opens the Open dialog window. On the top right corner, you can find Search text box; enter file name or portion of the file name, it displays the results. Here we are searching for word documents which contain test in their file name.