Problem
These handlers are installed by default when IIS is installed with ASP.NET, if they are missing it is advisable to contact Microsoft to assist in re-adding these handlers into the IIS configuration.
Error Message
Event ID: 41370 An error occured while synchronizing Indexing Engine metadata for Index volumes.|Error Details:|The remote server returned an unexpected response: (405) Method Not Allowed.|The remote server returned an error: (405) Method Not Allowed
Event ID: 41335 An error occured while trying to start indexing engine.|Further error details include: 'The remote server returned an unexpected response: (405) Method Not Allowed.'
Event ID: 41312 The Indexing Service could not complete all the required startup routines: Starting Index Engine failed. Service will be stopped
V-437-71370
V-437-41335
V-437-41312
Cause
This error is caused by a missing handler for ASP.NET on the EVIndexing virtual directory within IIS on the EV server
Solution
Add the required handlers for .aspx files to the EVIndexing virtual directory and to all other Enterprise Vault virtual directories on the server. These handlers are normally defined at the Website level and propagated downwards via inheritance through the virtual directories belonging to this website. All Enterprise Vault virtual directories will require these handlers so it is best to add them in at the website level.
Contact Microsoft to assist in re-adding these handlers into the IIS configuration.