You can attach files from your device or choose files already in your media library. Attachments can go with a message in a channel, direct conversation or thread reply.
Upload a file
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Open the composer
Open the Team Chat conversation or message thread where the file belongs.
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Choose a file
Select the plus button, then choose Attach file. Pick one or more files from your device. You can also drag files into the message composer.
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Review the attachment
Selected files appear in a preview above the composer. Remove any you do not want to send. Each file must be no larger than 25 MB.
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Send
Write an optional message and select Send. When multiple files are selected, Chat sends each file as its own message; your typed text and any item links are included with the first file.
Attach existing media
Select the plus button and choose Attach from media. Pick a file already in your workspace media library, review it in the pending attachment area and send. The chat message references the existing file rather than uploading a new copy from your device.
Sharing a media file is not the same as changing its library permissions. The person opening it still needs access under the workspace rules.
To attach a link to an app item rather than a file, see Share Documents, Forms and Tasks in Team Chat.