Error: The LDAP server is unavailable.

Error: The LDAP server is unavailable.

Description: There can be many reason.

  1.  Slow network connection issue.
  2. The LDAP server is not reachable or up and running.
  3. No enough permission to access the server.
  4. The LDAP server is not configured properly.
  5. Programming logical error.
  6. Server not accessible across networks.


  1. Check the network connectivity is up and running.
  2. Check the configuration and permissions.
  3. Check the server is accessible across networks, different domains etc.

Managing Directory Security Principals in the .NET Framework 3.5