Skip to main content
NetApp Knowledgebase

OnCommand Unified Manager unable to communicate with authentication server when setting up an LDAP connection

Applies to

OnCommand Unified Manager 7.3

OnCommand Unified Manager 9.4 - 9.5

Active IQ Unified Manager 9.6

Active IQ Unified Manager 9.7


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

  • Testing connectivity throws 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.




Registered NetApp customers get unlimited access to our dynamic Knowledge Base.

New authoritative content is published and updated each day by our team of experts.

Current Customer or Partner?

Sign In for unlimited access

New to NetApp?

Learn more about our award-winning Support