IIS 8 W2012 After Exchange 2010 SP3 installation http error 500.21

Hi everyone,

I am getting the below error(s) when a client clicked on options section after they logged in to the OWA of Exchange 2010.

Managed handler is used; however, ASP.NET is not installed or is not installed completely.
There is a typographical error in the configuration for the handler module list.
During application initialization, either the application initialization feature has set skipManagedModules to true, or a rewrite rule is setting a URL that maps to a managed handler and is also setting SKIP_MANAGED_MODULES=1.

Install ASP.NET if you are using managed handler.
Ensure that the handler module's name is specified correctly. Module names are case-sensitive and use the format modules="StaticFileModule,DefaultDocumentModule,DirectoryListingModule".
Ensure that any application initialization rewrite rules set SKIP_MANAGED_MODULE=0 when setting a URL that maps to a managed handler (such as .aspx, for example.)
As an alternative, ensure that application initialization rewrite rules map the request to an unmanaged handler (for example, to an .htm file, which is mapped to the StaticFileHandler.)

</div> <div class="content-container">

Module	IIS Web Core
Notification	ExecuteRequestHandler
Handler	PageHandlerFactory-Integrated
Error Code	0x8007000d

</div> <div id="details-right">

Requested URL	https://localhost:443/ecp/default.aspx?rfr=owa&p=PersonalSettings/Password.aspx
Physical Path	C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\ecp\default.aspx
Logon Method	Anonymous
Logon User	Anonymous

</div>

IIS 8 W2012 After Exchange 2010 SP3 installation http error 500.21 - internal server error