I also have observe that you are joining to windows Active Directory Domain Controller instead of ubuntu Active Directory Domain Controller.
As mentioned in the comment #15 on 2017-12-18
When i changed
/etc/ldap/ldap.conf:
to
TLS_REQCERT Allow
and connect to Windows Active directory Domain controller i was able to join with client ldap sasl wrapping = plain workaround but
when used tried to join Ubuntu AD DC i get below error:-
Sign or Seal are required.>, res_matched: <>
kinit succeeded but ads_sasl_spnego_gensec_bind(KRB5) failed: Strong(er) authentication required.
Please re run this test when other ubuntu is configured as AD DC.
I also have observe that you are joining to windows Active Directory Domain Controller instead of ubuntu Active Directory Domain Controller.
As mentioned in the comment #15 on 2017-12-18
When i changed ldap.conf: spnego_ gensec_ bind(KRB5) failed: Strong(er) authentication required.
/etc/ldap/
to
TLS_REQCERT Allow
and connect to Windows Active directory Domain controller i was able to join with client ldap sasl wrapping = plain workaround but
when used tried to join Ubuntu AD DC i get below error:-
Sign or Seal are required.>, res_matched: <>
kinit succeeded but ads_sasl_
Please re run this test when other ubuntu is configured as AD DC.