Good morning,
as reported in [OF-722] issue, since version 3.9.2, openfire should support the delivery receipts storage as offline message but it seems not work on version 4.0.2.
I can not find informations about it. It is possible that no one has the same problem?
[OF-722] https://issues.igniterealtime.org/browse/OF-722?jql=project%20%3D%20"OF"%20A ND%20text%20~%20offline
Thanks.