See the install guide for information:

"Licensing Considerations

The authentication methods available to you depend on the features of your product license.

If your license includes the DirectoryContributors feature:
• You can use LDAP or Laserfiche Directory Server to authenticate users.
• All users authenticated through Laserfiche Directory Server will be able to contribute to the site.

If your license does not include the DirectoryContributors feature:
• You must use Laserfiche Directory Server to authenticate users.
• Only named users (full, read-only, restricted) have unrestricted access to the site and can create content.
• Other authenticated users (not named users) cannot create posts or replies."