When calling https://graph.microsoft.com/v1.0/teams/{id}/channels/{id}/messages/delta endpoint, I am getting a `400 (Bad Request) response.
I am experiencing the same issue in Microsoft Graph Explorer even after providing Admin Consent.
Below are some relevant posts I found where people are experiencing similar issues
- https://github.com/microsoftgraph/microsoft-graph-docs/issues/7631
- https://docs.microsoft.com/en-us/answers/questions/201576/when-i-call-the-api-to-get-message-list-by-using-d.html
- MS Graph - Conversation delta API not working for some channels
However the beta version of the aforementioned endpoint is functioning properly, but the beta version of Graph API is not advisable to be used in a production app.