Need Assistance Recovering Deleted Teams Chat Evidence

Question

Hi, I need assistance regarding deleted messages/files in Microsoft Teams.

A colleague sent me sensitive information that should not have been shared. The situation has now escalated, and the colleague has deleted the messages/files from the chat afterwards.

Is there any way to recover or verify that the messages/files were originally sent, so I can provide evidence to my superiors?

Any guidance on message recovery, audit logs, admin access, or retention history would be appreciated.

Answer 1

Dear @Mark Jordaan,

Deleted Microsoft Teams messages and files may still be verifiable in certain admin-controlled scenarios, even if they are no longer visible in the Teams chat itself. In particular, your organization’s IT Admin, Compliance, or Microsoft Purview administrator may be able to investigate this through Microsoft Purview eDiscovery, depending on your organization’s retention settings, legal holds, and how the original content was stored. Finding content in Microsoft Teams in eDiscovery | Microsoft Learn [bece-4387-789-c746]

To move forward, if you are just an end-user, I would recommend contacting your organization’s IT administrator as soon as possible and asking them to:

Go to Microsoft Purview > Solutions > eDiscovery

In the panel > choose Create case

In the created case > choose > Create a search

In the search > choose Add data sources

Then, search for your colleague's name/ email address in the Search box > Search > choose it > Save and Close

Here is a reference: Find and delete Microsoft Teams chat messages in eDiscovery | Microsoft Learn

Microsoft also provides audit logging for Teams activities, which can help confirm that certain actions took place, provided auditing was enabled at the time and the audit retention period still includes the relevant dates. However, audit logs are generally more useful for confirming activity than for reconstructing full deleted message content. For actual message evidence, eDiscovery remains the stronger and more appropriate path. Search the audit log for events in Microsoft Teams | Microsoft Learn

I hope the information shared helps point you in the right direction.

As a moderator, I do not have the tools to investigate your specific account directly, as this is a support forum between users. Moderators and collaborators, including external Microsoft employees, may not directly intervene in the functionality of Microsoft products or access internal systems. Our role is limited to providing technical guidance on reported problems, requests, or ideas. However, I will do my best to guide you as clearly as possible.

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Answer 2

Deleted Teams content can only be recovered or proven in limited, admin-controlled ways.

Key points from the provided information:

1. Messages deleted by retention or admins cannot be recovered

• Teams messages can be removed by:
  • A user deleting their own message.
  • An organization’s retention policy expiring and deleting messages.
  • An admin using eDiscovery search and purge.
• When a retention policy deletes messages, they are replaced in the client by a system message. These messages “can’t be recovered.”
• When an admin purges Teams chat messages via eDiscovery, the user’s copy is deleted immediately and cannot be recovered by the user. The compliance copy is retained only temporarily for compliance/hold scenarios and then permanently deleted.

2. What users can see or verify

• If a message was deleted by a retention policy, a system message appears in the chat/channel indicating that messages were deleted by the organization’s retention policy.
• If an admin deleted a message via eDiscovery, the original message is replaced in the Teams client with an automatically generated message stating that an admin removed the message.
• If a user deleted their own message, it will no longer appear; there is no end-user method in the provided information to restore or view it once deleted.

3. Role of retention policies and admins

• Retention policies are configured by the organization and control how long Teams messages and files are stored.
• Messages deleted by a retention policy cannot be recovered.
• Even if a user deletes a message, the organization may have configured a retention policy that keeps a compliance copy for a period of time for legal or regulatory reasons. Access to such data is typically limited to compliance or IT admins using tools like eDiscovery.

4. Files shared in Teams

• Files shared in Teams chats or channels are stored in OneDrive or SharePoint.
• Deleted files may be recoverable from:
  • OneDrive Recycle bin (for personal chat files).
  • SharePoint Recycle bin (for channel files), including first-stage and second-stage recycle bins.
• Recovery actions require appropriate permissions and are usually performed via OneDrive or SharePoint, not directly from the Teams chat.

5. Practical steps

• Contact the organization’s IT or compliance/admin team and explain the situation. They control:
  • Retention policies.
  • eDiscovery and compliance tools that may still hold a compliance copy of the messages for a limited time.
  • SharePoint/OneDrive recycle bins and retention for shared files.
• Ask them to:
  • Check whether a retention policy or eDiscovery hold exists that might preserve the messages.
  • Review compliance copies or audit/compliance logs if available.
  • Check OneDrive/SharePoint recycle bins or version history for any shared files.

If the organization’s retention policies and compliance tools no longer hold the data (for example, the retention period has expired or the compliance copy has been purged), the messages/files cannot be recovered or proven from Teams according to the provided information.

---

References:

• Microsoft Teams messages about retention policies
• Find and delete Microsoft Teams chat messages in eDiscovery
• Delete and recover files in Microsoft Teams
• Restore items in the recycle bin that were deleted from SharePoint or Teams