There are three messaging related privileges.
Chat User
The Chat User permission provides basic access to the messaging system, including direct messages and limited channel interaction.
What This Permission Allows
Access to Chat interface
Send and receive Direct Messages (DMs)
Participate in Group Messages
Channel Access Behavior
Channels are read-only by default
Users can:
View messages in channels
Stay informed on updates
Users cannot send messages in channels unless additional permissions are granted
Chat: Channel Sending Access
The Channel Sending Access permission extends chat capabilities by allowing users to actively participate in channels.
What This Permission Allows
Send messages in Channels
Reply, interact, and engage in channel conversations
Participate fully in team or organization-wide discussions
Dependency
Requires Chat User permission to be effective
Chat: Enable Direct Messages
The Enable Direct Messages permission controls whether users can initiate and participate in one-on-one and group conversations.
Users without this permission retain access to chat channels based on their other chat permissions but cannot send direct messages or create group conversations.
What This Permission Allows
Send direct messages to other users.
Start new one-on-one conversations.
Create and participate in group conversations.
Send messages in existing direct message and group conversations.
What Happens Without This Permission
Users without this permission can:
View public and private channels they have access to.
Read channel conversations (based on their channel permissions).
Users without this permission cannot:
Send direct messages.
Start new direct message conversations.
Create new group conversations.
Send messages in existing direct message or group conversations.
If a user attempts to send a direct message or group message without this permission, the action will be denied.
Manage Chat Integration (Admin)
The Manage Chat Integration permission provides administrative control over chat configurations and integrations.
What This Permission Allows
Manage Chat Integrations and deletions
Create and manage Channels
Configure messaging-related settings at an organizational level
Access Level
Typically restricted to Admins or designated power users