To connect your Mattermost user account to your Microsoft Teams account:

1. Log in to Mattermost using your user credentials.
2. In any Mattermost channel, type /msteams connect as a message, and select Send.
3. Select the resulting link to connect your accounts.
4. Authenticate with Microsoft Teams using the email address and password matching your Mattermost account.
5. Mattermost will confirm when your account is successfully connected.