Confirmed by MS. Status: Service degradation User impact: Affected users are unable to authenticate to and access Microsoft 365 services. Latest message: Title: Unable to access Microsoft 365 services User Impact: Affected users are unable to authenticate to and access Microsoft 365 services. Current status: We've received reports of an issue affecting access to Microsoft 365 services. We've identified a degraded portion of infrastructure that manages authentication requests and have restarted that infrastructure to mitigate impact. Scope of impact: This issue may potentially affect any of your users attempting to access Microsoft 365 services. Start time: Tuesday, January 29, 2019, at 9:15 PM UTC Preliminary root cause: A portion of infrastructure that manages authentication requests is degraded, affecting access to one or more Microsoft 365 services. Next update by: Tuesday, January 29, 2019, at 10:30 PM UTC Updated: 2019-01-29 21:40 (UTC) Start time: 2019-01-29 21:15 (UTC) From: Outages <outages-bounces@outages.org> On Behalf Of Bruce Freshwater via Outages Sent: Tuesday, January 29, 2019 3:48 PM To: outages@outages.org; David Rubin <drubin@cubexgroup.com> Subject: Re: [outages] O365 Down Dame here in Pittsburgh and San Fran. -bruce On Tue, Jan 29, 2019 at 4:45 PM -0500, "David Rubin via Outages" <outages@outages.org<mailto:outages@outages.org>> wrote: Portal is down - login.microsoftonline.com<http://login.microsoftonline.com>'s server IP address could not be found. Clients starting to complain. Nice way to end a Tuesday on the east coast. -- David Rubin Cubex Group 223 Wall Street - PMB #267 Huntington, NY 11743 646.221.3283 If you have a support-related issue, please email to support@cubexgroup.com<mailto:support@cubexgroup.com>.