Mattermost Boards (formerly known as Focalboard) is accessible from the Product menu in the top left corner of Mattermost.
If you’re using Mattermost 6.0, select the Product menu in the top left corner of Mattermost to activate Boards. The Boards dashboard is where you can get started, where you’ll find all the boards you have access to, and also where you can navigate between workspaces. Once you’ve activated Boards, you’ll see a tab at the top of Mattermost called Boards. Select that for quick access to your dashboard.
For self-hosted deployments using versions 5.38 and earlier, Boards is available in the Marketplace.
As a System Admin, go to Main Menu > Marketplace.
Search for Boards.
Select Install if not yet installed, then select Configure to enable.
From the plugin configuration page, set Enable Plugin to true.
Select Save to enable the plugin.