orgContacts should support "msExchHideFromAddressLists"
Full story: Our goal was to query an API that is "like" the tradional GAL. In theory the GAL is just a combination of users and contacts, so we thought that this would be ok-ish just get all users first and then query orgContacts.
Unfortunately we discovered that the orgContacts API (https://docs.microsoft.com/en-us/graph/api/orgcontact-list?view=graph-rest-1.0&tabs=http) will return all contacts from the tenant.
In our tenant some contacts are flagged with msExchHideFromAddressLists and this would be a NoGo four our application to surface such "hidden" contacts. We didn't found a way to filter them.
It would be nice to have this "old school" exchange property somehow supported in the new orgContacts API to ensure, that only contacts are seen in our application that the administrator doesn't want to hide.