Additional chat-related features and issues within Microsoft Teams for business
Hello,
To be able to copy Teams message without timestamp and sender information, all you have to do is to NOT use double click of mouse to select the text you want to copy, neither Ctrl+A.
Just use mouse cursor to select a text you wish to copy, once highlighted, press Ctrl+C and paste with standard Ctrl+V.
Microsoft Teams Version 1.6.00.1381 (64-bit).
Have a nice day
Vojtěch