It's not serious. It's catastrophic!
Server Error in '/' Application.
Server was unable to process request. --> LDAP://CN=xxx_xx,DC=co,DC=uk --> Catastrophic failure
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Server was unable to process request. --> LDAP://CN=xxx_xxxxxxxx,DC=co,DC=uk --> Catastrophic failure
Version Information: Microsoft .NET Framework Version:1.1.4322.2032; ASP.NET Version:1.1.4322.2032 Server Error in '/' Application.
Server was unable to process request. --> LDAP://CN=xxx_xx,DC=co,DC=uk --> Catastrophic failure
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: Server was unable to process request. --> LDAP://CN=xxx_xxxxxxxx,DC=co,DC=uk --> Catastrophic failure
Version Information: Microsoft .NET Framework Version:1.1.4322.2032; ASP.NET Version:1.1.4322.2032