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Lync 2013 and Skype for Business<br />
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Skype for Business is just an upgraded version of Lync 2013.<br />
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There are two versions of Skype for Business, one is on premises version while the other is on subscription for Office 365.
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Lync 2013 and Skype for Business

Skype for Business is just an upgraded version of Lync 2013.

There are two versions of Skype for Business, one is on premises version while the other is on subscription for Office 365.

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Thank you. So, in Lync 2013 terms, what version is S4B? Like Service Pack 2?<br />
<br />
and is S4B a client or server?<br />
<br />
And what benefits of upgrading from Lync 2013 to S4B?
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Thank you. So, in Lync 2013 terms, what version is S4B? Like Service Pack 2?

and is S4B a client or server?

And what benefits of upgrading from Lync 2013 to S4B?

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In short, Lync 2013 is rebranded as S4B after MS acquired Skype.<br />
<br />
<a href="http://www.communityit.com/blog/skype-for-business-s4b-update/" rel="ugc">http://www.communityit.com/blog/skype-for-business-s4b-update/</a>
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In short, Lync 2013 is rebranded as S4B after MS acquired Skype.

http://www.communityit.com/blog/skype-for-business-s4b-update/ [http://www.communityit.com/blog/skype-for-business-s4b-update/]

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Can someone explain the difference to me? Is one the client and the other referring to the backend?<br />
<br />
Or is S4B just another name for Lync 2013?
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Can someone explain the difference to me? Is one the client and the other referring to the backend?

Or is S4B just another name for Lync 2013?

Lync 2013 and Skype for Business

Microsoft Lync Server (renamed Skype for Business Server in 2015) is a real-time communications server software that provides infrastructure for enterprise instant messaging, presence, VoIP, ad hoc and structured conferences (audio, video, and web), and PSTN connectivity through a third-party gateway or SIP trunk. These features are available within and between organizations, and with external users on the public internet or standard phones (on bpth PSTN and SIP trunking).

Microsoft Lync Server

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.