A Microsoft account allows you to sign in to a wide range of Microsoft 365 apps and services using a single email and password. However, at times, you may encounter issues signing in to these apps.

We couldn’t sign you in. If this error persists, contact your system administrator and provide the error code CAA20008. This error could result from various factors ...

Microsoft has confirmed fresh bugs on Classic Outlook with new CAA2000B, 4usqa, and 49dvs sign-in errors. A workaround has been issued. Microsoft recently addressed a major bug related to Classic ...