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When you try to send a meeting that exceeds the maximum meeting size to participants in Microsoft Skype for Business 2016, you receive a warning message that displays an invalid participant number.
Note The maximum meeting size is set by a conference policy.
To fix this issue, install the November 7, 2017, update (KB4011238) for Skype for Business 2016.
Keywords: kb, kbsurveynew, kbfix, kbexpertiseInter, kbqfe, invalid participant number, warning message, exceeding size meeting, exceed participant limit