Depends on the number of employees and degree of integration. If you're a large enterprise (say >10k employees) then changing your meeting scheduling platform would readily cost hundreds of thousands of dollars in employee time.

Therefore, your exiting meeting scheduling platform should charge at a commensurate amount because they can get away with it.

Interestingly, this can create a market where new adopters use competitively priced, or even FOSS, whilst at the same time enterprises pay tens or hundreds of thousands of dollars a month for legacy alternatives. Even when the legacy product is inferior.

Given enough time, the new adopters become large enterprises and the formerly competitive/FOSS suppliers become incentivised to take advantage of the switching cost and raise prices / change licensing. This opens a market for new suppliers to the 'new' new adopters and the cycle continues.