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NetApp Stage KB

OCUM unable to communicate with authentication server when setting up an LDAP connection

Last Updated:


Applies to

  • OnCommand Unified Manager 9.4 - 9.5
  • OnCommand Unified Manager 7.3
  • Active IQ Unified Manager 9.7
  • Active IQ Unified Manager 9.6


Unable to set up connection to a Lightweight Directory Access Protocol (LDAP) server for authentication within Unified Manager.

  • Testing connectivity reports the following error:

'Unable to communicate with the authentication server due to the following reasons: No subject
alternative names matching IP address found'

  • If LDAP was previously working in the environment, it is also observed that LDAP users can no longer login successfully.


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