Description:
After the Indeed CM Server or Enterprise Management Console is installed and configuration files are set up, Internet Explorer gives HTTP 500 - Internal Server Error when trying to log in to any web service of the system:



Solution:
The error might be attributed to that the required application pools have not been correctly registered in the course of Internet Information Services (IIS) service installation.

To avoid this, it is recommended to install IIS role first, according to the Indeed CM system requirements, and then install Microsoft .NET 4.5 or later version.
If the system is already deployed, then it is necessary to re-register ASP.NET applications in the IIS service.  To do so, use Aspnet_regiis.exe from Microsoft .NET Framework (usually resides in C:\Windows\Microsoft.NET\Framework\v4.0.xxxxx folder) and execute the following command in the command line run as administrator:

Aspnet_regiis.exe -i  - for Windows Server 2008R2

dism /online /enable-feature /featurename:IIS-ASPNET45 - for Windows Server 2012R2