Lync® Online is a Microsoft Office 365 hosted communications offering that provides the collaboration capabilities of Lync Server 2013 a cloud-based service. The various Lync Server roles (front-end servers, Mediation Server, Edge Server, etc.) all run in Microsoft data centers.
Now, with the recent version 1.6 of Citrix HDX RealTime Optimization Pack for Lync and provides the Lync client XenApp / XenDesktop in a Lync Online environment is easier than ever.
Just like organizations that have their own Lync Server infrastructure on-site host, would Lync Online customers prefer the Lync client in a "deliver optimized" way, the scalability of their XenApp / XenDesktop server to maximize and to eliminate unnecessary "hairpinning" (or "tromboning") of audio-video traffic through the data center. Such optimized architecture is possible for Lync Online customers through the Citrix HDX RealTime Optimization Pack for use Lync, which does not require changes to the back-end Lync Server infrastructure. The Optimization Pack consists of two components: (1) the HDX RealTime Connector for Lync runs alongside the Lync 2010 client in the virtual desktop user's desktop, to make sure that when a user places a call from the media processing is unloaded (2) the HDX realTime Media Engine on the user device (Windows, Linux or Mac). The Citrix HDX RealTime Media Engine VDI plug-in for Windows is analogous to Microsoft Lync, which unfortunately does not Lync Online / Office 365. Like the Lync VDI plug-in, the HDX RealTime Media Engine Microsoft's proprietary RT Audio and RT contains video supported codecs and proprietary SIP extensions. Additionally, it includes several industry-standard codecs, especially H.264, various flavors of H.263, G.711 and G.722 several variants, so that interoperability with many third-party in-room conferencing systems, which are of the registry able with the Lync front-end server.
completely to Lync Online, Version 1.6 of the HDX RealTime Optimization Pack for Lync provides a variety of compatible authentication methods.
No doubt, the most important for large companies support is Active Directory Federation. Using this method, the company reserves its Active Directory on the premises, and the authentication of the Environmental Office is achieved through 365 claims-based Single Sign-On. With composite confidence access to manage Lync Online reduces or eliminates the need for duplicate accounts and other credential management overhead. The user ID is checked by the organization on the local Active Directory instead of Office 365 Azure Active Directory.
Small customers (usually less than 0 users) can use Office prefer 365 Cloud Identities. In this model, the user accounts are created and stored in Office 365 and managed in Azure AD and the password is verified by Azure AD. Office 365 onboarding is simple with this approach, there is nothing, the other must be configured to create a user in the center Office 365 Admin.
A third alternative for authentication to Lync Online is the Microsoft Azure Active Directory Sync Tool. In this model, the user identities in a local Active Directory servers are managed and the accounts and password hashes are synchronized with the Office 365 cloud. The password hash is designed so that it is the user's plaintext password can not be reversed to reveal. Additional security processing is applied to the password hash before it is synchronized in the Azure AD authentication service. When a user logs in Lync Online, the user's password is verified by Azure Active Directory. This model is popular with SMB and large enterprise customers.
For an overview of the authentication and Single Sign-On through the HDX RealTime Optimization Pack mechanisms supported for Lync, see CTX135647 that updates in the process of being to describe AD Federation to Lync Online.
Derek Thorslund,
director of product management, HDX
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