Windows SQL Server Express 2012 and LDAP external server integration

I have a new installation of Windows Server 2012 with SQL Server Express 2012 with the management tools. I'm planning to create there a simple synchronization that will make queries twice per day to an external LDAP service (not a Windows active directory server) and fill a table in the local SQL instance. I've seen other questions here about this, and all of them refer to the creation of a Linked Server, but I think that will only work if the remote LDAP service was a Windows AD server. I'm able to query this server using the LDP tool, but looks like I cannot add it as a linked server. Any ideas?