ECP failure in exchnage 2010

Question

We have installed exchange 2010 standard on server 2012 Standard.  Also installed exchange 2010 sp3.  We get errors when we try to access any of the options or ecp features from OWA.  Not sure if we need to also install asp.net 4.5?
HTTP Error 500.21 - Internal Server Error
Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module listMost likely causes:
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.
 Things you can try:
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.)
 Detailed Error Information:
Module    IIS Web Core
Notification    ExecuteRequestHandler
Handler    PageHandlerFactory-Integrated
Error Code    0x8007000d
Physical Path    C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\ecp\default.aspx
Logon Method    Basic

Answer 1

Hi，
Please check if ASP.NET is installed.
Open "Server Manager"--Role--Add Role Services for IIS--Application Development--ASP.NET
Wendy Liu
TechNet Community Support