Add and co-edit files in a conversation
Open the channel chat and attach a document by clicking the attachment icon to share a file directly in Teams. Choose a source (recent file, cloud storage, browse channels, or upload from your device) and send the post; the file appears as a card in the thread. Use the Shared tab to view channel documents, create new items like folders or Word, Excel, PowerPoint, OneNote, forms, or links, and start collaborative work without leaving Teams. Files can be opened, edited, and saved online, and important items can be added as tabs for quick access.