Wednesday October 22, 2025

From 6:00 AM PDT to 9:18 AM PDT on October 22, 2025, some Slack workspaces with EKM (Enterprise Key Management) enabled may have experienced issues with sending messages, uploading files, using Slack Connect, querying search, Slack AI, and using workflows.

We traced this back to an unexpected spike in traffic to our backend service responsible for EKM processes, leading to a reduction in service responsiveness. We identified the problematic servers and initiated a restart, restoring full functionality to the EKM backend services.

While our initial communication indicated issues related to sending messages and file uploads, our follow up reviews have identified additional features that were also affected, including:

• Slack Connect
• Search
• Slack AI
• Workflows

9:29 AM PST

This issue is now resolved for all users.

• Current status and recent actions taken: We've addressed the problematic backend services and success rates have returned to normal. Our health metrics confirm affected featuers are operational.
• Scope: A small number of enterprise users with EKM enabled.
• Previous impact to end users: Some users may have seen trouble sending or receiving messages, including threads, as well as uploading files (or viewing previews/thumbnails).
• Required resolution steps: No required steps.

We apologize for any disruptions to your day.

9:25 AM PST

Our work on this issue is still ongoing, but no major updates to provide at this time.

• Current status and actions being taken: We're currently working toward a path to fully resolve the issue, but continue to observe signs of improvement.

We'll provide another update in 30 minutes until impact is resolved for all users.

9:00 AM PST

We're continuing to investigate this issue, but have identified the root cause as being related to Enterprise Key Management (EKM) servicing issues. We are also observing some signs of improvement with message sending, but we continue to work toward a full resolution.

• Current status and actions being taken: We've identified the root cause and are focused on resolving the EKM servicing issues.
• Estimated time to resolution: None at this time.
• Scope: Enterprise orgs with EKM services enabled.
• Current impact to end users: Some users may experience trouble loading file previews/thumbnails and sending or receiving messages, including threads.
• Known workarounds: None at this time.

We'll be back with another update in 30 minutes or sooner.

8:25 AM PST

We're investigating a new incident.

• Current impact to end users: Users may see inconsistent errors when attempting to send messages in Slack, and some file previews/thumbnails may have trouble loading.

We'll provide an update within 30 minutes including further details on current actions being taken.

8:02 AM PST