Microsoft are withdrawing the internet service which Pellcomp uses for multi-factor phone call authentication on September 30th 2020. As an alternative, Pellcomp have enabled the SMS authentication method which can be used instead of phone calls.
If you are currently using a desk phone which does not support SMS then you will no longer be able to use that device for multi-factor authentication after September 30th. To help identify issues prior to the cut-off date, Pellcomp will restrict all hosted users to SMS from Monday 21st September. This change can be reverted on a per user basis until the final deadline of September 30th 2020. If you encounter issues, please email firstname.lastname@example.org