Best of all your personal invitation link doesnt expire and can be used anytime.

Skype for business video conference limit. Conferencing configuration settings determine such things as the maximum allowed size for meeting content and handouts. A Skype for Business Online user can initiate Skype-to-Skype audio and video calls with another user in the same Skype for Business Online organization within or outside the corporate firewall or with another Skype for Business user in a Skype for Business federated domain if the two Skype for Business domains are correctly configured. The limit says you should be able to have 250 participants with video.

Group video calls are subject to a fair usage limit of 100 hours per month with no more than 10 hours per day and a limit of 4 hours per individual video call. Most Skype for Business customers use the Microsoft-provided Audio-Video Conferencing Server as their conference bridge also known as a multipoint control unit MCU. If the conference has more than five participants video of only the most active participants appears in the top row and a picture appears for the other participants.

Skype recommends a 15Mbps up and down connection for high definition calls while Zoom is a bit more demanding at 38Mbps up and 3Mbps down. Skype for Business Online provides multiparty three or more users audio and video conferencing capabilities. Skype for Business Multiparty Audio and Video.

Unlike MCUs from some other vendors eg. Maximum amount of bandwidth for the Application Sharing Conferencing service. The only built-in method to control application sharing bandwidth is via the Conferencing Policies within Skype4B.

Here is an article for your reference. Skype for Business Online Limits. The Meeting should also be able to host up to 250 participants.

Storage limits and expiration periods. The size of meetings that Skype for Business Server can support depends on whether conferencing is hosted on a shared or dedicated pool. Skype has a few limitations in the business environment which may mean it is not the right fit for your business video conferencing requirements.