Learn how to share files, communicate, and collaborate safely using platforms like Microsoft Teams, Slack, and Zoom.
Secure Use of Collaboration Tools
Microsoft Teams, SharePoint, Slack, and Zoom have become the backbone of modern work. Misconfiguring these tools — or using them carelessly — can expose sensitive information to unintended audiences.
The Sharing Settings Spectrum
⛔ Important
“Anyone with the link” shares are more dangerous than they appear. The link can be forwarded to anyone — a competitor, a journalist, a member of the public — and there is no way to control or track who accesses it. If the link ends up in a search engine cache, the file may be discoverable by anyone forever.
Microsoft Teams Security
Teams channels and chats are not automatically encrypted end-to-end — they are protected by Microsoft’s platform security, which is strong, but it means:
- Adding a guest to the wrong Teams channel exposes everything in that channel to them
- External members remain in Teams even after a project ends unless explicitly removed
- Sensitive files shared in chat remain accessible in OneDrive after the chat is deleted
✓ Key Point
Periodically review who is in your Teams channels — especially teams with guest/external members. Remove guests who no longer need access. Check the Teams admin centre for a full list of external users in your tenant.
Secure Collaboration Checklist
| Platform | Key Security Actions |
|---|---|
| SharePoint / OneDrive | Use “Specific People” links for sensitive docs; set link expiry dates |
| Microsoft Teams | Review guest access quarterly; remove inactive guests |
| Zoom | Use unique meeting IDs; enable waiting room; lock meeting once started |
| Email with attachments | Consider SharePoint links with access controls instead of attachments |
| Slack | Audit third-party app integrations; restrict file sharing to approved channels |
Posting Sensitive Data in Chat
Never post the following in Teams, Slack, or any chat platform:
- Passwords or credentials (even temporarily)
- Customer personal information
- Financial data, account numbers
- Confidential business strategy
⚠ Warning
Chat platforms are persistent and searchable. A password posted in a Slack channel “just for a minute” remains in search results indefinitely and may be accessible to all channel members, administrators, and during any future legal discovery process. Use a password manager — never chat.
Is Teams sharing more than it should?
One forgotten guest account or “anyone with the link” share can quietly expose your client data for years. Mobile Techs IT Service helps Gold Coast businesses lock down their collaboration tools — Microsoft 365 and Teams security configuration, safe sharing policies, guest access reviews, and staff guidance on handling sensitive files. Home users welcome too — on-site or remote, anywhere in Australia.
Get your collaboration tools locked down → or call 1300 644 588
