LDAP result misses multi-valued attribute returns
Since the implementation of Apple's Addresbook Extension "X-ABLabel" it can be possible to have multiple values for a single CardDAV field. I.e. multiple 'phoneNumber' entries.
These need to be returned by LDAP as multi-valued attribute which isn't handled at the moment, whilst (at least) Yealink process multi-valued attributes correctly.
Need to get implemented.