[kees99]

In general, servers should have nothing to do with end-to-end encryption, except for not actively breaking it.

OMEMO in particular uses:

- Personal Eventing Protocol (PEP, XEP-0163) to transport key material; and

- core RFC3920/RFC6120 XMPP protocol to transport encrypted messages.

Both of which are already supported by Openfire [see JM-1122]. So, as far as I can tell, Openfire is fully capable of delivering OMEMO messages right now.

https://issues.igniterealtime.org/browse/JM-1122

[EDIT] For Adium OMEMO support, have a look at Lurch: https://github.com/shtrom/Lurch4Adium