What would be the best way for Sharepoint online users to attach documents from the Sharepoint site to an email? Preferably using the "attach file" option from Outlook/Owa. I know Microsoft recommends to offline-sync the files with Onedrive for business, but that has a 5000 item limit and you risk that the synchronization fails. I'd love to use a mapped network drive, but they lose connection on each restart and it's not even enough to log in to your sharepoint site, you have to click "open in explorer" to make them work again. I've seen here some similar questions with efforts to refresh the connection in order to keep it alive, but it doesn't seem to work.
Has anyone got a satisfactory solution to this seemingly obvious user request?