Tuesday November 26, 2019

Incident Summary:

On November 15, 2019 we introduced a change to the Single Sign-On login flow in Slack for mobile. This lead to some people being stuck in a loop when trying to sign into our mobile apps. Following reports from affected customers, on November 27 we rolled back the change and restored the previous SSO login flow.

2:15 AM PST

Users should no longer be facing trouble logging in to their workspaces from their mobile, using single sign-on (SSO) or otherwise. Thank you for sticking with us while we worked through this.

2:32 AM PST

Some customers are currently unable to login to Slack on our mobile apps, particularly when using single sign-on (SSO). We're currently investigating, and we're sorry for the disruption. In the meantime, you can login with the following steps:

1. Visit https://slack.com/signin on a mobile web browser
2. Sign in to the Slack workspace
3. Tap 'Open Slack' to launch the workspace in the Slack app

10:20 PM PST