Hi @JimmyYang-MSFT ,
As I wrote, it only happens in Teams-PRE. Here is a screenshot (there is no error message). While the first organisation (APPLICATTIO Training und..." exist ans works (that is our Teams), the second (APPLICATIO Training &..." does not exist for many years... it is not shown in Teams (other than PRE) and is also not show under organisations in my profile (we are creating under Office 365 E3)... Everything else is working fine, the "wrong organisation" does not affect anything, just makes me wonder...
Cheers
Thorsten