Can anyone please provide details on below question. How do we know Skype attendee maximum other than 250 participants indicated by Microsof
Not sure what exactly the question is here? The limits for SfB Online are listed here: https://technet.microsoft.com/en-us/library/skype-for-business-online-limits.aspx
You can also find comparisson with the SfB server on the same page. For larger meeting, use SfB Broadcast: https://support.office.com/en-us/article/What-is-a-Skype-Meeting-Broadcast-c472c76b-21f1-4e4b-ab58-3...