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Skype for Business, Lync and Exchange Web Services (EWS) and different DNS Domains- Exchange crawling e.g. for presence
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Skype for Business 2015 – The Head Master in the Central Management St | ITPro Today: IT News, How-Tos, Trends, Case Studies, Career Tips, More
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Warning: May2017 windows update break Lync 2010,2013 and Skype for Business 2015 services – IT based Communications
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Skype for Business Server 2015 December 2017 Cumulative Update–Lots of fixes and Improvements – Martin Boam's Microsoft Blog
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No connectivity with any of Web Conferencing Edge Servers. External Skype for Business clients cannot use Web Conferencing modality. - Hab's Blab
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