Migrate chat history Teams

There is currently no native Microsoft method to fully migrate Teams chat history between tenants, so you generally have three approaches.

Option 1: Use a third party migration tool. Some tools can migrate or preserve chat history, but fidelity varies. Reactions, timestamps, attachments, and conversation structure may not transfer exactly as they appeared in the source tenant.

Option 2: Export the chats using Microsoft Purview or eDiscovery for compliance and retention purposes. This preserves the records, but they will not appear as native chats in the destination tenant.

Option 3: Migrate the users, Teams, channels, and files while keeping the old tenant available in read only form for a limited period so users can reference historical conversations.

Before selecting a migration solution, I would confirm exactly how the vendor handles Teams chat data and what limitations apply.

A small pilot migration is definitely recommended before moving the full organization.