replied on August 24, 2015
It doesn't matter whether you have 1000 users or 10, the answer is the same: https://answers.laserfiche.com/questions/57296/public-portal-requiring-full-license
As Pava says in the selected answer:
Does the user trying to login fulfill the criteria Brianna listed above? They need to be marked as Read Only or in a group marked as Read Only. They can neither have nor inherit the Manage Trustee privilege, as that automatically bypasses Read Only.
The login must be made into a Laserfiche Server setup as a public portal instance, connections to other Laserfiche Servers will not work. In an unlimited instance, you need to confirm that the public portal processor allotment is equal to or greater then the number of processors on the Laserfiche Server machine.
If all of this appears to be the case, I'd suggest contacting Support.
1) Note that giving the user the "Read" rights to the repository isn't the same as marking them as "read-only".
2) Make sure your Laserfiche Server has been allocated the correct public portal license, as the public portal licensing is per Laserfiche Server, not per WebLink instance.
If you are certain these things are configured correctly, then you may wish to open a support case.