Calendar availability pop-up upon new project date selection

It is still there I still have it. You might have to check if it is on in your settings, it may have been turned off accidentally. Go to Company Settings → Preferences → Under Company Notifications → Make sure this is checked on “Display a notification when projects have conflicting dates”. 

Hey ​@Desiree Ryland! I just wanted to check in and see if the pop up is still not showing up in your account. If it’s not, I would recommend contacting support by clicking the little “?” icon on the bottom right corner of your account. They’ll be able to see the backend of your account and look for any bugs or what might be preventing it from showing up.