Hello
UPN are usually not case sensitive - as other Windows login
however, according to blogs.technet.com/.../office-365-amp-single-sign-on-how-to-handle-different-userprincipalname-upn-values.aspx it seems your issue may occurs
Hello
UPN are usually not case sensitive - as other Windows login
however, according to blogs.technet.com/.../office-365-amp-single-sign-on-how-to-handle-different-userprincipalname-upn-values.aspx it seems your issue may occurs