A team chat incident can be a service problem, a security problem, or both. Missing messages and broken calls may interrupt work; unexpected channel access, suspicious sign-ins, or data exposure require security and privacy escalation. The response should stabilize communication, preserve trustworthy evidence, and move sensitive coordination to an independent channel when necessary.
Open one incident record outside the affected system
Assign an incident identifier, lead, technical owner, communications owner, and recorder. Store the primary record somewhere the chat outage cannot erase or hide. Note detection time, reporter, affected workspaces, clients, channels, user groups, integrations, and the earliest confirmed symptom.
Separate observations from theories. “Messages posted after 08:10 do not appear on two mobile clients” is evidence. “The latest update deleted messages” is a hypothesis until logs and data support it. Record all times with a time zone and preserve original identifiers.
NIST's SP 800-61 Rev. 3 integrates preparation, detection, response, and recovery into cybersecurity risk management. Not every chat outage is a cybersecurity incident, but suspected unauthorized access, tampering, disclosure, or malicious activity should enter the organization's approved security process immediately.
Scope before making broad changes
Test with controlled accounts across representative desktop, mobile, and browser clients. Check sign-in, public and private channel visibility, sending and receiving, direct messages, threads, files, search, calls, notifications, and critical integrations. Record whether the problem affects existing content, new content, one client version, one network, or one identity group.
Preserve available administrative evidence before rotating settings or removing apps. Slack's audit log guidance says Enterprise audit logs record changes and usage and can be filtered by date, acting user, affected user, workspace or organization, and event. Availability is plan- and role-dependent. Record what evidence was unavailable rather than pretending the absence of a log proves nothing happened.
For suspected account compromise, review the approved access evidence. Slack's access log guidance describes sign-in time, IP address, and device entries, while noting coverage limits. Do not publish IP addresses, message contents, or personal details in a broad status update.
Contain without destroying evidence
Use the least disruptive action that controls the confirmed risk. A service failure may require pausing a broken integration, directing urgent work to a documented fallback, or rolling back a client or configuration. A security event may require ending affected sessions, restricting an app, or changing credentials under the organization's authorization process.
Do not bulk-delete channels, messages, accounts, or apps during triage. Do not change retention settings to “clean up” the incident. If the affected chat is untrusted, coordinate responders through an approved alternate channel and make it explicit which channel holds authoritative decisions.
Keep a decision timeline. For each action, record who performed it, the reason, approval, expected result, actual result, and rollback path. Preserve configuration identifiers and read-only exports where permitted. Slack's workspace export guidance shows that export scope depends on plan, role, and approval, and that exports may contain file links instead of the files. Treat an export as scoped evidence, not automatically as a complete backup.
Recover and reconcile
Restore a known-good service configuration or deploy a tested fix. Then verify more than the login screen. Account for marked test messages, channel memberships, private-channel boundaries, files, integration events, searches, notifications, and calls. Confirm that retries did not duplicate bot posts or external tickets.
Observe through directory synchronization, delayed webhooks, scheduled messages, and notification digests. Reconcile actions taken through the fallback channel with the restored workspace so assignments and decisions do not split across systems. If messages remain missing, state that plainly and preserve recovery ownership.
Communicate with precision
Internal updates should distinguish confirmed impact, suspected cause, containment, current workaround, unresolved risk, and next decision time. Customer or partner notices should be approved, proportionate, and free of speculation. Do not call the incident resolved while affected access or messages remain unaccounted for.
Close with a review that covers the leadup, detection, impact, response, recovery, and lessons. Assign actions such as improved logging, export testing, app-permission review, alternate communications, alerting, and rollback rehearsal. Each action needs an owner and date.
A good record lets another reviewer reconstruct what changed, what evidence supported each decision, how communications continued, and how normal access was verified. It protects the team from both lost context and confident but unsupported conclusions.
Sources
- NIST SP 800-61 Rev. 3 — National Institute of Standards and Technology, April 3, 2025
- Audit logs in Slack — Slack
- View access logs for your workspace — Slack
- Export your workspace data — Slack