We have a set of multi-homed tasks representing company holidays, that we import into all our projects. We just received the alert in the attached screenshot that makes it seem as if we’ve hit our limit on the amount of projects one of the tasks (MLK Jr Holiday) can be on
I agree, this is the only solution I can think of as well… or include those holidays in your project template, each project will have a section with the holidays, but harder to maintain overtime (even though holidays don’t change).