Calendar Owner Change

[susanlee07]

Hello! Someone in our company created a shared calendar. They are no longer in our group and want me to change them from the owner to me as the owner. I did this under properties, but when creating meetings she is still listed as the "administrator" and is the one receiving attendee responses. How can I change that? Or can I copy this calendar with all of its current events and make myself the administrator? 

[#2]

What type of "shared calendar" exactly is that. In other words, where did you make the owner change?

[#3]

Hello! I changed it in the Properties pop-up on the Permissions tab.

[#4]

OK, so it's a regular/shared mailbox. This means that it has an underlying user object, which is the de-facto owner. You will have to work with someone with admin permissions in your tenant, ask them to either grant you Full Access or reset the credentials and share them with you.