20/03/2023 10:03:00 AM (GMT)
NHSmail Reference : INC34857194
Microsoft Reference : IS529426
Issue Status : RESOLVED
Issue Description : Errors preventing access to some Microsoft 365 services when accessed through web browsers.
More Information : Users may have seen a service unavailable or a certificate transparency error page in their web browser.
Final Update : 20/03/2023 10:03:00 AM – Microsoft have determined that a Transport Layer Security (TLS) certificate update resulted in impact. They deployed new certificates to the services, which has remediated impact.
Scope of impact : This issue may have impact any user attempting to access Microsoft 365 services on web browsers.
Root cause : A TLS certificate update resulted in impact.
Next steps : Microsoft are reviewing the certificate update deployment and testing procedures to find ways of preventing this issue from reoccurring.