Copying files in a private or shared Microsoft Teams channel
In a standard Teams channel, with file sharing on for the connection, SlackBridge copies files from Teams into Slack as real files. In a private or shared channel it usually announces them by name instead, because those channels normally keep their files in their own SharePoint site that nothing in SlackBridge's existing permissions reaches. To turn real file copying on, a SharePoint or Global administrator grants SlackBridge read access to that one channel's site, and SlackBridge works out which sites need it and writes the command. There is no way to do it once for the whole organization. Two kinds of channel need no grant: private channels Microsoft has already moved to the team's site, and shared channels hosted by another organization, which you cannot grant at all. Pasted and copied images already come through everywhere file sharing is on, because Teams stores those with the message rather than in SharePoint. Files sent from Slack can be saved into such a channel too, but only if the administrator grants write instead of read, a separate choice; SlackBridge never saves files from Slack into a private channel whose files sit in the team's site, or into a shared channel another organization hosts.
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