Probably most of Exchange Server admin seen the Exchange initialization failed error once in their life , and i saw many time.
The content type is absent or invalid.
When i saw the Initialization failed error, of course i am following the related article on Exchange Server blog.
Some time, those stpes are not works.
If you have already follow the Exchange Team blog but didn’t work, then I am having additional solution steps about the The content type is absent or invalid. Error.
1) Remove : Application Development Features on IIS ( Asp.net , .Net Extensibility , ASP , CGI , ISAPI Extensions , ISAPI Fileters) . Then Re-Install the features again.
2) Remove : Application Server , Web Server IIS, .Net Framework 3.0 Features
Install the features and Roles again.
3) Remove : CAS server role on Exchange Server 2010 (Really will be work, i am not joking!) then Re-Install this role again
4) Remove : Backup your Exchange 2010 your organization then Re-Install again!
Didn’t Worked? It’s impossible