Hello Bence,
welcome to the Polycom Community.
The SoudnStation Duo like all other LYNC compatible SoundPoints and SoundStations running UC Software 4.1.0 or 4.1.1 are only LYNC 2010 or LYNC 2013 and not Skype for Business or Office 365 compatible.
This is explained and documented here:
Dec 6, 2011 Question: What Phone Models support the LYNC 2010, LYNC 2013, Microsoft Office365 and Skype for Business Online?
Resolution: Please check => here <=
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
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The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.
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Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
