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New Requirements for LDAP Authentication

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Beginning March 2020, Microsoft plans to release a security update on Windows Update to enable LDAP channel binding and LDAP signing hardening changes.

For more information, see the Microsoft support article, 2020 LDAP channel binding and LDAP signing requirement for Windows.

These new requirements from Microsoft will impact all Barracuda Networks partners and customers who have configured LDAP in the Barracuda Message Archiver with a non-SSL connection.

If you have not already done so, you must enable LDAP over SSL. For more information, see the Microsoft support article, How to enable LDAP over SSL with a third-party certification authority.

To modify the LDAP connection security in the Barracuda Message Archiver:

  1. Log into the Barracuda Message Archiver as the administrator, and go to USERS  > Directory Services.
  2. In the Existing Authentication Services section, click Edit on the LDAP directory you wish to modify.
  3. For the LDAP Port, type 636 as the port number.
  4. For the LDAP Encryption, select SSL.
  5. Click Test LDAP.
  6. If the connection is successful, click  Save at the top.