Recently I was asked to look at OwnCloud (http://owncloud.org/) as an alternative to SharePoint for storing various files. Everything was working fine but the Client Sync totally refused to work saying it was unable to find "webdav.php".
The solution was to reconfigure IIS as a PUT request was going wrong:
1) Open IIS and navigate down the tree to the host.
2) Double click Handler Mappings icon.
3) Find the PHP module you used "PHP53_via_FastCGI" and right click it and select Edit.
4) Click Request Restrictions.
5) Go to the Verbs tab.
6) Select the "ALL VERBS" radio dial.
7) Apply change and do an IISReset
Crazy fix and I'm not really sure what it's all about but it worked.
