IPA / Directory Server: Winsync based AD user import is failing due to "error 21:Invalid syntax" error

Solution Verified - Updated -

Issue

  • IPA / Directory Server: Winsync based AD user import is failing due to "error 21:Invalid syntax" error
[17/Aug/2021:15:28:40.688186827 +0800] - ERR - NSMMReplicationPlugin - windows sync - windows_update_local_entry - Failed to modify entry uid=aduser1,ou=CA,ou=People,dc=example,dc=test - error 21:Invalid syntax
  • Error can also be reproduced when running ldapmodify command.
ldap_modify: Invalid syntax (21)
    additional info: telexNumber: value #0 invalid per syntax

Environment

  • IPA 4.x
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Directory Server 11

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