Really? Thank you for this. I trust that you would know the prevailing practice. I have, over the years, addressed a number of American bishops of the Episcopal Church, both in the presence of their British counterpart(s) (or more recently, African) as well as alone, and none have ever corrected my use of “Your Grace” nor have they asked that another term be used…although my usage is, admittedly, in typically formal settings and perhaps they were being polite to me. Retired, I may not have the occasion to use this insight now but I shall remember to ask them, after using the formal title of address, if they prefer to be addressed otherwise.
I am reminded of a meeting with a Catholic archbishop from a Commonwealth nation. The Americans (and others, too) universally use “Your Excellency” for bishops and archbishops. Catholic archbishops of Commonwealth nations are addressed “Your Grace” to distinguish them from mere bishops. Forgetting that he was of the Commonwealth, I addressed him as “Your Excellency”. He visibly blanched and I immediately realised my error and said: “I beg your forgiveness, Your Grace; I momentarily forgot that you are, of course, from X”. He replied, “It is understandable that one could have such a lapse. We forgive you.” I have not repeated that mistake, happily.
In the instance of ordained women, I confess to being guided either by how they introduce themselves or are introduced to me. If I cannot divine a clue from the initial moments, I try to ask as discreetly as possible how they prefer to be addressed and respect what they tell me.