The login trouble has been resolved. Organization Owners and guests should be able to sign in with email addresses and passwords once again. We're sorry for the interruption to your workflow and we appreciate you bearing with us while we worked on a fix.
11:28 PM PDT - Jun 20th・See in your timezone
It looks like we're out of the woods, but we are still monitoring the situation to be sure. Thank you for your patience.
11:13 PM PDT - Jun 20th・See in your timezone
We've identified a potential cause and we're digging in to possible solutions.
10:43 PM PDT - Jun 20th・See in your timezone
We are investigating an issue where some Organization Owners and guests are unable to log in to Slack using their email address and password. We apologize for the disruption.
10:10 PM PDT - Jun 20th・See in your timezone