Assistant: messages, uploads and Word and Outlook history

Messages: the last lines of your message stay above the composer buttons when you scroll through the text.
Uploads: a refused file shows the reason returned by the server, such as an oversized file, an unsupported format or an exhausted quota.
Word and Outlook: the pane’s history lets you resume conversations from your account, including those started on the web.
Attachments: from Word or Outlook, browse your workspace folders or search for a document to attach to the conversation.