[German]Another short tip for administrators in corporate environments who need an overview of which IPs and URLs at Microsoft are contacted by Office 365.
The people at Microsoft created such a list and have now extended it for Microsoft teams.
We've updated the Office 365 IPs and URLs with a new range in the Optimize category for Microsoft Teams. Ensure you add 52.120.0.0/14 in addition to the normal 52.112.0.0/14 and 13.107.64.0/18 to any firewalls, QoS Policies or Split Tunnels for VPNs.https://t.co/W5O5n7RCLj
— Tony Woodruff (@woodruff_tony) March 26, 2020
The above tweet refers to the relevant article at Microsoft with the required information. Maybe its helpful.