diff --git a/libervia/backend/plugins/plugin_misc_identity.py b/libervia/backend/plugins/plugin_misc_identity.py
index 41ca44d1..f678c35b 100644
--- a/libervia/backend/plugins/plugin_misc_identity.py
+++ b/libervia/backend/plugins/plugin_misc_identity.py
@@ -254,7 +254,7 @@ class Identity:
         cb_list.append(callback)
         cb_list.sort(key=lambda c: c.priority, reverse=True)
 
-    def get_identity_jid(self, client, peer_jid):
+    async def get_identity_jid(self, client, peer_jid):
         """Return jid to use to set identity metadata
 
         if it's a jid of a room occupant, full jid will be used
@@ -266,8 +266,7 @@ class Identity:
             return client.jid.userhostJID()
         if self._m is None:
             return peer_jid.userhostJID()
-        else:
-            return self._m.get_bare_or_full(client, peer_jid)
+        return await self._m.get_bare_or_full(client, peer_jid)
 
     def check_type(self, metadata_name, value):
         """Check that type used for a metadata is the one declared in self.metadata"""
@@ -306,7 +305,7 @@ class Identity:
         @param use_cache: if False, cache won't be checked
         @param prefilled_values: map of origin => value to use when `get_all` is set
         """
-        entity = self.get_identity_jid(client, entity)
+        entity = await self.get_identity_jid(client, entity)
         try:
             metadata = self.metadata[metadata_name]
         except KeyError:
@@ -398,7 +397,7 @@ class Identity:
         @param entity(jid.JID, None): entity for which avatar is requested
             None to use profile's jid
         """
-        entity = self.get_identity_jid(client, entity)
+        entity = await self.get_identity_jid(client, entity)
         metadata = self.metadata[metadata_name]
         data_filter = metadata.get("set_data_filter")
         if data_filter is not None:
@@ -448,7 +447,7 @@ class Identity:
         This method may be called by plugins when an identity metadata is available.
         @param origin: namespace of the plugin which is source of the metadata
         """
-        entity = self.get_identity_jid(client, entity)
+        entity = await self.get_identity_jid(client, entity)
         if (entity, metadata_name) in client._identity_update_lock:
             log.debug(f"update is locked for {entity}'s {metadata_name}")
             return
diff --git a/libervia/backend/plugins/plugin_xep_0045.py b/libervia/backend/plugins/plugin_xep_0045.py
index 25ed7f90..652682c0 100644
--- a/libervia/backend/plugins/plugin_xep_0045.py
+++ b/libervia/backend/plugins/plugin_xep_0045.py
@@ -396,20 +396,27 @@ class XEP_0045:
             return False
         return True
 
-    def is_room(self, client: SatXMPPEntity, entity_jid: jid.JID) -> bool:
-        """Check if a JID is a joined MUC.
+    async def is_room(self, client: SatXMPPEntity, entity_jid: jid.JID) -> bool:
+        """Check if a JID is a joined MUC or a known MUC service.
 
         @param client: The client instance.
         @param entity_jid: JID of the entity to check.
-        @return: True if the JID is a joined MUC.
+        @return: True if the JID is a joined MUC or a known MUC service.
         """
         try:
             self.check_room_joined(client, entity_jid.userhostJID())
         except exceptions.NotFound:
-            return False
+            # It's not a joined room (yet?), we check disco as fallback.
+            try:
+                return await self.host.memory.disco.has_identity(
+                    client, "conference", "text", entity_jid.userhostJID()
+                )
+            except Exception:
+                log.exception(f"Can't get identity of {entity_jid.full()}")
+                return False
         return True
 
-    def get_bare_or_full(self, client: SatXMPPEntity, peer_jid: jid.JID) -> jid.JID:
+    async def get_bare_or_full(self, client: SatXMPPEntity, peer_jid: jid.JID) -> jid.JID:
         """Use full JID if peer is an occupant of a room, bare JID else.
 
         @param client: The client instance.
@@ -417,7 +424,7 @@ class XEP_0045:
         @return: Bare or full JID.
         """
         if peer_jid.resource:
-            if not self.is_room(client, peer_jid):
+            if not await self.is_room(client, peer_jid):
                 return peer_jid.userhostJID()
         return peer_jid
 
@@ -917,19 +924,10 @@ class XEP_0045:
 
         if room_jid in muc_client.joined_rooms:
             room = muc_client.joined_rooms[room_jid]
-            log.info(
-                f"{client.profile} is already in room {room_jid}",
-                profile=client.profile,
-                room_jid=room_jid.userhost(),
-            )
+            log.info(f"{client.profile} is already in room {room_jid.userhost()}")
             raise AlreadyJoined(room)
 
-        log.info(
-            f"[{client.profile}] joining room {room_jid} as {nick}",
-            profile=client.profile,
-            room=room_jid.userhost(),
-            nick=nick,
-        )
+        log.info(f"[{client.profile}] joining room {room_jid.userhost()} as {nick}")
 
         password = options.get("password")
 
diff --git a/libervia/backend/plugins/plugin_xep_0444.py b/libervia/backend/plugins/plugin_xep_0444.py
index 90034cfa..f9f2668e 100644
--- a/libervia/backend/plugins/plugin_xep_0444.py
+++ b/libervia/backend/plugins/plugin_xep_0444.py
@@ -314,7 +314,7 @@ class XEP_0444:
             store = False
         else:
             # we use bare JIDs for one2one message, except if the recipient is from a MUC
-            if self._m.is_room(client, dest_jid):
+            if await self._m.is_room(client, dest_jid):
                 # this is a private message in a room, we need to use the MUC JID
                 reacting_jid = self._m.get_room_user_jid(client, dest_jid.userhostJID())
             else: