Teams conversations visible in Outlook search?

Hi,

We have a customer which are experience a strange issue.

They have a groupchat (private chat) with the entire company and when some users searches in their Outlook they can see conversation history from that chatgroup in Outlook.

I have never seen this before and can´t reproduce the issue on my own environment.

Have some of you experienced this before?

I´ll attach a picture of how it looks, and just to be clear, we can´t see the information in any folder inside his mailbox, it´s only appears when he search on a name which are a part of the group:

//Martin