Bulk Night Opening Option?

A bulk date opening (or closing) option in IGMS would be helpful. I am trying to open dates on my VRBO calendar for 6 months for each of my 5 listings. I was told by IGMS support that I have to open each night individually for 6 months for each property. With each date that I have to open, there is a buffering delay, making the process of opening up 6 months of days for my 5 properties (900 nights) very time consuming. Thank you for your time!