Hello,
At the moment, the only way to fix the ‘Status Unknown’ issue on Microsoft Teams is to change the Coexistence mode for your organization from ‘Islands’ to ‘Teams only’. Here it is:
Once you select this option, all users in your organization will be restricted to use only Teams for communication and collaboration.
You can check the availability of the fix in User Voice: 33978883--status-unknown-for-many-users
Please mark as "Accept the answer" if the answer helps you. Your suggestion will help others also !
Regards,
Manu