28-10-2021 01:28:00 PM (GMT)
Issue reported: 27/10/2021 11:03:00 AM
Microsoft Reference : MO294291
NHSmail Reference : INC24719296
Issue Status: RESTORED
Issue Description: Users were not receiving Multi-Factor Authentication (MFA) Short Message Service (SMS) messages to access M365 services.
More info: Users were recommended to use voice calls or non-telecom authentication methods to complete Multi-Factor Authentication.
Scope of impact: Impact was specific to users who were subscribers of the impacted 3rd party cellular provider.
Final Update – 03/11/2021 09:33:00 AM: Microsoft confirmed with the 3rd party cellular provider in the United States that impact has been mitigated.