How can I reassign a staff to an existing appointment?

[pennwolf]

I synced my calendar and Square assigned all appointments to me, but I want to reassign a staff member to some of those appointments.  I click on the appointment and change the staff member but the save button is grayed out,

[AshleyK]

Hi @pennwolf! Are you able to send screenshots of this (and please blur out any sensitive information? If you merge/sync a calendar, it will merge all events as a personal event, which is what I believe has happened here. 

Also, as a temporary workaround, you can try to recreate the appointment on Square's side with the Staff member assigned to that slot.