Why a flat licensing for 4PSA OXtender for Plesk?
Together with Open-Xchange we offer a flat, per month license for OXtender. The OXtender for Plesk includes the Open-Xchange server licenses. This allows Plesk administrators to add Open-Xchange to their existing Plesk infrastructure in several minutes. OXtender can still be used with Open-Xchange centric licensing. In this case the price of the product is lower because it does not includes the OX seat licenses.