Team chat can become an informal archive for customer details, internal decisions, files, meeting transcripts, credentials, and incident discussions. A privacy and security review should trace that information across messages, direct chats, private channels, search, notifications, integrations, mobile devices, exports, retention, and deletion. Product marketing is not proof that the chosen workspace configuration is safe.
Inventory data and communication paths
List channel types, direct messages, group chats, threads, files, link previews, huddles or meetings, recordings, transcripts, canvases, bots, workflows, email ingestion, and connected storage. Record which data types are permitted and prohibited. Use invented content in testing; do not put real credentials, customer records, private keys, or regulated data into a test workspace.
The FTC personal-information guide recommends identifying sensitive information and tracing how it moves. Apply that to desktop, web, and mobile clients as well as notifications and exports. A message can appear on lock screens, in email digests, search indexes, backup systems, administrative exports, and third-party bots even after a user thinks it is gone.
Review identity and account recovery
Check single sign-on, multifactor authentication, guest accounts, external collaborators, session duration, device enrollment, account recovery, and offboarding. Start with administrators, security roles, and users who handle sensitive material. Test removal of a controlled account and verify that active sessions, app tokens, guest access, and shared links behave as expected.
CISA's MFA guidance for businesses recommends MFA wherever possible and gives preference to phishing-resistant methods. Record which methods the selected plan supports, whether administrators can require them, and what weaker recovery path could bypass them. Do not call a workspace phishing-resistant merely because it offers a security key option that is not actually enforced.
CISA's broader small-business cybersecurity resources likewise identify MFA, updates, logging, backups, and encryption as practical business safeguards. Check whether the chat plan exposes the necessary controls and whether the organization has assigned an owner to maintain them.
Make channel boundaries explicit
Test who can discover, join, invite into, and export each type of channel. Verify what guests see before and after they join, whether private-channel names leak, and how membership changes are recorded. Review default permissions for creating public links, adding apps, inviting outside organizations, changing retention, and installing custom bots.
Least privilege applies to integrations too. A calendar bot may not need to read every direct message; a support connector may not need file-export permission. Record each scope, data owner, installation approver, vendor, secret location, activity log, and removal procedure. Remove unused integrations and rotate tokens that were exposed.
Examine content and file risks
Messages can carry phishing links, malicious files, deceptive requests, and previews that contact external servers. Review link handling, external-image behavior, malware scanning claims, file restrictions, download controls, data-loss controls where available, and reporting paths. Teach users to confirm high-impact requests through an approved route rather than trusting the display name or urgency of a chat message.
The FTC's Start with Security guide emphasizes limited collection, need-based access, secure disposal, and service-provider oversight. Use those principles for chat retention. Keeping every message forever can expand discovery and breach impact; deleting too quickly can undermine support, safety, or record obligations. Define retention by channel purpose and preserve legal or operational holds through an authorized process.
Test privacy controls and administrative visibility
Document what ordinary users, workspace owners, enterprise administrators, and the vendor can access. Review export features, audit logs, e-discovery features, deletion behavior, regional controls where relevant, model-training or AI settings, and customer-managed encryption claims. Tell users truthfully about administrative access; a private channel is not necessarily private from authorized workspace administration.
Check meeting recordings, transcripts, summaries, presence, attention indicators, profile fields, and analytics separately. Record default states, notice and consent controls, retention, and who can download the outputs. The NIST Privacy Framework can help connect these design choices to risks for individuals and the organization's actual business need.
Prepare for compromise and outages
Enable useful audit logging and test detection of a controlled risky event, such as an unauthorized app installation or unusual export, without touching real conversations. Document how to revoke sessions, suspend an account, remove an app, preserve evidence, notify responsible owners, and provide a fallback communication path during an outage.
Export a small invented workspace if the plan permits it and verify what is included. Record missing threads, files, identities, reactions, or timestamps. Keep recovery material outside the chat system and protect it. Do not use personal messaging accounts as an undocumented continuity plan.
State the result narrowly
The review record should name the workspace plan, clients, settings, identity controls, roles, integrations, retention rules, export coverage, tested events, failures, owners, and retest date. Separate vendor documentation from observed behavior. Mark untested enterprise features as unverified rather than assuming they work on a smaller plan.
A defensible conclusion describes the tested configuration and remaining risks. It does not promise absolute confidentiality, rely on encryption as the only control, or imply that a direct message is invisible to every administrator, backup, integration, and endpoint.
Sources
- Protecting Personal Information: A Guide for Business — Federal Trade Commission
- Require Multifactor Authentication — Cybersecurity and Infrastructure Security Agency
- Small and Medium-Sized Business Resources — Cybersecurity and Infrastructure Security Agency
- Start with Security: A Guide for Business — Federal Trade Commission
- NIST Privacy Framework — National Institute of Standards and Technology