could you confirm whether or not Cisco Unity connection version 11.5 supports a speech view integration with Office 365?
if so could you point me in the right direction?
I don't think so, the related bug is still open for enhancement. Please find the details of the bug as below;
I checked the release note for release 12 and not mentioned about it. I advise you to contact a Cisco to have better clarity on the roadmap of the same.