diff --git a/src/components/ServerNotices.js b/src/components/ServerNotices.js
index a0f37da..39864cf 100644
--- a/src/components/ServerNotices.js
+++ b/src/components/ServerNotices.js
@@ -6,9 +6,10 @@ import {
   TextInput,
   Toolbar,
   required,
-  useCreate,
+  useMutation,
   useNotify,
   useTranslate,
+  useUnselectAll,
 } from "react-admin";
 import MessageIcon from "@material-ui/icons/Message";
 import IconCancel from "@material-ui/icons/Cancel";
@@ -59,26 +60,50 @@ const ServerNoticeDialog = ({ open, loading, onClose, onSend }) => {
   );
 };
 
-export const ServerNoticeButton = ({ record }) => {
+export const ServerNoticeButton = ({ record, selectedIds }) => {
   const [open, setOpen] = useState(false);
   const notify = useNotify();
-  const [create, { loading }] = useCreate("servernotices");
+  const unselectAll = useUnselectAll();
+  const [create, { loading }] = useMutation();
 
   const handleDialogOpen = () => setOpen(true);
   const handleDialogClose = () => setOpen(false);
 
   const handleSend = values => {
-    create(
-      { payload: { data: { id: record.id, ...values } } },
-      {
-        onSuccess: () => {
-          notify("resources.servernotices.action.send_success");
-          handleDialogClose();
+    if (record) {
+      create(
+        {
+          type: "create",
+          resource: "servernotices",
+          payload: { data: { id: record.id, ...values } },
         },
-        onFailure: () =>
-          notify("resources.servernotices.action.send_failure", "error"),
-      }
-    );
+        {
+          onSuccess: () => {
+            notify("resources.servernotices.action.send_success");
+            handleDialogClose();
+          },
+          onFailure: () =>
+            notify("resources.servernotices.action.send_failure", "error"),
+        }
+      );
+    } else {
+      create(
+        {
+          type: "createMany",
+          resource: "servernotices",
+          payload: { ids: selectedIds, data: values },
+        },
+        {
+          onSuccess: ({ data }) => {
+            notify("resources.servernotices.action.send_success");
+            unselectAll("users");
+            handleDialogClose();
+          },
+          onFailure: error =>
+            notify("resources.servernotices.action.send_failure", "error"),
+        }
+      );
+    }
   };
 
   return (
diff --git a/src/components/users.js b/src/components/users.js
index 8e6c75b..616f699 100644
--- a/src/components/users.js
+++ b/src/components/users.js
@@ -51,6 +51,7 @@ const UserBulkActionButtons = props => {
   const translate = useTranslate();
   return (
     <Fragment>
+      <ServerNoticeButton {...props} />
       <BulkDeleteButton
         {...props}
         label="resources.users.action.erase"
diff --git a/src/synapse/dataProvider.js b/src/synapse/dataProvider.js
index 859dc73..6d5486c 100644
--- a/src/synapse/dataProvider.js
+++ b/src/synapse/dataProvider.js
@@ -221,6 +221,29 @@ const dataProvider = {
     }));
   },
 
+  createMany: (resource, params) => {
+    console.log("createMany " + resource);
+    const homeserver = localStorage.getItem("base_url");
+    if (!homeserver || !(resource in resourceMap)) return Promise.reject();
+
+    const res = resourceMap[resource];
+    if (!("create" in res)) return Promise.reject();
+
+    return Promise.all(
+      params.ids.map(id => {
+        params.data.id = id;
+        const cre = res["create"](params.data);
+        const endpoint_url = homeserver + cre.endpoint;
+        return jsonClient(endpoint_url, {
+          method: cre.method,
+          body: JSON.stringify(cre.body, filterNullValues),
+        });
+      })
+    ).then(responses => ({
+      data: responses.map(({ json }) => json),
+    }));
+  },
+
   delete: (resource, params) => {
     console.log("delete " + resource);
     const homeserver = localStorage.getItem("base_url");