On, or after, February 28th, traffic will start coming from the following IP addresses:
54.93.34.174 3.121.21.226 3.122.2.191
Therefore, we advise anyone relying on fixed IP addresses to whitelist all seven addresses as soon as possible to avoid any disruption to their calendar connections.
We have been able to determine calendars we believe to be relying on the existing fixed IPs and will be in touch with the related customers individually.
Once the current IP addresses are out of service we will create a separate maintenance notification to confirm that they can be removed.