How to reflect availability from a subscribed Google Calendar to colleagues using Outlook Web Application

I use a Google Calendar for all of my events. In order to coordinate with team members at another company, I have to use a calendar in Outlook Web Application. I want those team members to be able to see my availability alongside the availability of other team members so that they can schedule meetings at times when everyone is available.

From my Google Calendar, I copied the Public address in iCal format url and in Outlook,

I chose Open calendar…

and pasted that url as an Internet calendar.

Here's what I see in Outlook Web Application.

It is reflecting events from my Google Calendar under the other calendar.

When my team members try to look across other people's availability, I think they are right-clicking other calendars, choosing open, and typing a name into the from directory field

Which then lists each person's calendar as another other calendar.

How can I get my subscribed Google Calendar availability to be visible to my colleagues in this way?

I searched for this, but all I came up with was instructions to import or subscribe to another calendar in the first place, and I've already subscribed to my Google Calendar.