The mount commands works, now.
But delegate connects to localhost, why?
It should connect to 1.2.3.4

Here my log:

2+0: 040  3  2 005 1.2.7.2. [UNV  4]( 8) "kric0999"
2+0: 059  2  8 043 1.2.8. [UNV 16]( 5)
2+0: 05b  3  1 000 1.2.8.1. [UNV  4]( 3) "uid"
2+0: *** ou=group,dc=uni-xy,dc=de => ldaps://1.2.3.4:636/ ***
2+0: MOUNTed to ldaps://1.2.3.4:636/ <= ou=group,dc=uni-xy,dc=de
2+0: LDAP-SERVER=[]=[:389]
connect(12) REFUSED*1, retry after 500ms ...
2+0: [12] ConnectToServer connect failed 127.0.0.1:389 [0.52s] errno=146
2+0: ERROR: cannot connect to ldap://:389 - -1
2+0: E-C: Can't connect: mypc:42419 => ldap:// (refused)
2+0: willSTLS_SV: ServerFlags=10
2+0: #### proxy connection error response



Btw:
Your engine replaced in my last posting the IP "1.2.3.4" to "3..", twice.