If you started using our Slack integration prior to November 14th, 2018, we highly recommend upgrading the integration. In order to upgrade, simply follow the installation instructions here.
Note: If you set up Teams activity notifications for private Slack channels or direct messages using our old integration, those will initially fail after upgrading. However, if we notice any failed notifications, we'll send you an email with a link to re-authorize your account with the new integration.
Once you authorize the new integration to access the private Slack channels or direct messages, the notifications will resume.