I'm not really sure what you mean, we do check as many calendars as you'd like for availability (we write the event into just one, though).

Can you please email us at support@useace.com all the details (what calendars you'd like to check, etc) so we can look more closely into this?

Thanks!

Example:

If I have linked a google account which has:

Owned Calendars:
Cal A
Cal B

Subscribed / Shared Calendars (which the google account does not own but has access to view / edit):
Cal C
Cal D

The availability check is currently possible only across Cal A & Cal B.

But Cal C & Cal D can be my work calendars or any other calendars where my appointments gets managed from.

So in effect for a smooth booking experience when I create a meeting in ACE and share the link, the availability should be checked across Cal A, Cal B, Cab C & Cal D. (This is possible in most of the scheduling tools)

Else we will end up with a double booking.

I'll also write to support with the screenshots for you internal review.