Hello PolyNube,
welcome to the Polycom Community.
The community's VoIP FAQ contains this post here:
Jul 11, 2014 Question: Since upgrading to UCS 5.1.1 or later and running LYNC base profile I can no longer access the Web Interface
Resolution: Please check => here <=
or
Jul 06, 2016 Question:Since Upgrading to UC Software 5.5.0 in Generic Base Profile I can no longer use HTTP?
Resolution: HTTPS only is supported since UC Software 5.5.0 only. Please check => here <= for more details
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services