Security issues when trying to connect to the “skypeforbusiness.us” domain in Skype for Business 2015 (Lync 2013)

Resolution

To fix this issue, install the August 1, 2017, update (KB4011046) for Skype for Business 2015 (Lync 2013).

Note Lync 2013 was upgraded to Skype for Business in April 2015.

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