STEP 1: UPLOAD AND TAG A DOCUMENT
The document has to exist in the SharePoint document library. Upload and tag a document by using a Document Information Panel within a modern document library.
STEP 2: OPEN THE DOCUMENT
Open the document with the Word/Excel/PowerPoint application, not using Office Online.
STEP 3: OPEN THE PROPERTIES PANEL
Click on Info Tab, next click on Show All Properties
All of the SharePoint document library metadata exists in your document.
STEP 4: MAKE METADATA CHANGES
For example, you need to change a Status from Pending to Submitted and save the document back to SharePoint by clicking Save button in Word/Excel/PowerPoint.
STEP 5: CHECK REVISED METADATA IN SHAREPOINT
In SharePoint another version of the document was created, check the Document Information Panel
It works if you download a document from a SharePoint document library and start working on it offline.