Slack experienced a minor incident on June 8, 2026 affecting Login/SSO, lasting 35m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 08, 2026, 07:00 PM UTC
Some users in EMEA may be failing to receive 2FA codes via SMS when logging into Slack. We are investigating the trigger and working to resolve this incident as quickly as possible. We will provide another update in 30 minutes or sooner as we have more details to share.
- resolved Jun 08, 2026, 07:35 PM UTC
The issue affecting SMS-based two-factor authentication for users in EMEA has been resolved, and all services are now functioning as expected. We have adjusted configuration settings to restore normal service and will continue to monitor the situation to ensure stability. We apologize for how you and your business may have been affected by this. We will perform a full investigation of the incident, confirming the technical trigger, the underlying cause, and preventive action to avoid a repeat in the future.