Hi Michael, Quannah and Howard,

 thanks for great support.

 I've some progress, but I did not solved/tested problem yet (working on it). So I'll summarize my progress:

First of all, at Ubuntu 16 (and probably others as well) LDAP binary is compiled without "meta" support -> that caused some strange errors when I was trying for conversion -> need to build LDAP server from sources and install it on target system.

As reference I used "slapd-meta.conf" from sources. But there was some variables, which I had to change. For example I changed "@BACKEND@" to "./servers/slapd/schema/", "@URI@" to "ldap://127.0.0.1:389/" and so on.

Then convert command was successful:

$ slaptest -f ~/slapd-meta_test.conf -F /tmp/slapd.d/

If there will be some problem, I'll let you know. Also in case I'll run it successfully. I'll post manual as well.

Best regards

  Martin Stejskal