We've got a very rare SharePoint 2013 setup here.
SharePoint 2013 Enterprise (on-prem)
ADFS 3.0
Shibboleth (IdP)
ApacheDS LDAP users
So far we've been able to get SSO working nicely across the portal using the above configuration. when users open office documents, they are not prompted for extra credentials which is what we wanted. (previously we had a direct LDAP connection which kept on asking people to sign in again when opening office docs)
But now Windows Explorer View and Mapping drives do not work anymore.
Some people suggest it might be incompatible with SAML, but then I have seen it work with Office 365 and ADFS, which is using SAML for another customer. So I won't accept the "SAML won't support WebDAV" blanket answer.
Anybody got any clue as to what I might need to change to get Folder Views back for my users?