Microsoft has a patent called "sending meeting requests and group plans from mobile devices". Then many kinds of mobile phones that can make multi-party calls in the world have already involved this patent. In fact, many patents are hooligans. For example, some common but unique knowledge is widely cited, which was originally public, but it has been patented by some people with ulterior motives, so you can't use it.
For example, another patent of Microsoft is "choosing a control tool for editing electronic files". This popular understanding is like if you want to open a txt document with your mobile phone, then many tools are installed in your Android system to read and edit txt documents, such as ordinary Quick office, WPS mobile version, Polaris office and so on. At this time, your mobile phone will let you choose which software to use to open this TXT document. Then the selected function may involve a patent applied by Microsoft.
And although we take this thing for granted, it has indeed been patented by Microsoft. The only way to deal with it is to see if you have a similar patent that can hold Microsoft by the throat and then sue separately. Finally, let them sit at the negotiating table and see how to solve this problem, whether it is even or who will pay the bill.
Fighting in the mall is too hooligan.