To access the document library navigate to the room required and click on 'Document'.
Click 'Add' to add documents to the document library or create a new folder.
You can do this within the main document library or a specific folder.
Select the files you wish to upload and click 'Open'.
Please note: Only PDFs are visible in the apps. This will not affect users viewing the document library via the portal where Microsoft Office files can be opened as normal.
Once the document has uploaded you will see an 'Upload Complete' dialogue box.
You will also have additional options in the adjacent menu: Rename, Delete, New Version, Download, Move and Details.