There are a number of places in Sierra that the settings need to be checked/changed; though, they are all pretty much set the same. You may want to try this yourself because, once you do it a couple times, it will be faster than contacting me to do it. Of course, I would be happy to assist if you prefer.
The procedure is here in the OWLSnet Manual. Everyone should already have the username and password to get in. If not, please ask your supervisor or contact me over the phone. Note that your printer name may be different than in the procedure (i.e. Visitor Cards printer).