Cisco-owned multi-factor authentication (MFA) provider Duo Security is investigating an ongoing outage that has been causing authentication failures and errors starting three hours ago. The outage ...

Microsoft’s May Patch Tuesday update is triggering authentication errors. Microsoft is alerting customers that its May Patch Tuesday update is causing authentications errors and failures tied to ...

Struggling with Microsoft Teams Error AADSTS90023 Invalid Authentication? Discover step-by-step fixes to resolve this Azure ...

Microsoft is investigating an authentication issue impacting multiple Microsoft 365 cloud services including Microsoft Teams, as well as Xbox Live. The company said the problem began just after noon ...

Microsoft has shed some light on the root cause behind yesterday's massive Azure authentication outage that affected multiple Microsoft services and blocked users from logging into their accounts.

A fix introduced into Windows last month to close a weakness in Kerberos authentication is causing logon failures for some Windows Hello for Business (WHfB) users, Microsoft has warned. In theory, the ...

I have a couple Intranet "applications" that use NTLM authentication to grab the user's login name, and then use that to retrieve their info from a database (everyone ...