Hi Vivek Makwana,
As far as I know, Microsoft Teams doesn’t enforce a strict limit on the number of chat entries or days shown in the sidebar. Instead, visibility is based on recent activity, pinned chats (up to 15), and usage patterns. Older or inactive chats may drop off the list but are still accessible via search. There’s no official cap by date or number of chats.
For more details, you can refer to Microsoft’s official documentation on Teams limits and specifications: https://learn.microsoft.com/en-us/microsoftteams/limits-specifications-teams.
Hope this helps!