diff --git a/js/apps/admin-ui/maven-resources/theme/keycloak.v2/admin/messages/messages_en.properties b/js/apps/admin-ui/maven-resources/theme/keycloak.v2/admin/messages/messages_en.properties
index f81428855f..eedb633c71 100644
--- a/js/apps/admin-ui/maven-resources/theme/keycloak.v2/admin/messages/messages_en.properties
+++ b/js/apps/admin-ui/maven-resources/theme/keycloak.v2/admin/messages/messages_en.properties
@@ -3222,7 +3222,8 @@ emptyUserOrganizationsInstructions=There is no organization yet. Please join an
 joinOrganization=Join organization
 sendInvitation=Send invitation
 removeConfirmOrganizationTitle=Remove organization?
-organizationRemoveConfirm=Are you sure you want to remove user from the {{count}} selected organizations?
+organizationRemoveConfirm_one=Are you sure you want to remove user from the selected organization?
+organizationRemoveConfirm_other=Are you sure you want to remove user from the {{count}} selected organizations?
 organizationRemovedSuccess=User removed from organizations
 organizationRemoveError=Could not remove user from organizations\: {{error}}
 organizationName=Organization name
@@ -3231,3 +3232,4 @@ join=Join
 userAddedOrganization_one=Organization added to the user
 userAddedOrganizationError=Could not add organizations to the user\: {{error}}
 userAddedOrganization_other={{count}} organizations added to the user
+sentInvitation=Sent invitation
diff --git a/js/apps/admin-ui/src/organizations/OrganizationModal.tsx b/js/apps/admin-ui/src/organizations/OrganizationModal.tsx
index 80e8a79c4e..b018c63156 100644
--- a/js/apps/admin-ui/src/organizations/OrganizationModal.tsx
+++ b/js/apps/admin-ui/src/organizations/OrganizationModal.tsx
@@ -1,17 +1,23 @@
 import OrganizationRepresentation from "@keycloak/keycloak-admin-client/lib/defs/organizationRepresentation";
 import UserRepresentation from "@keycloak/keycloak-admin-client/lib/defs/userRepresentation";
 import { Button, Modal, ModalVariant } from "@patternfly/react-core";
+import { differenceBy } from "lodash-es";
 import { useState } from "react";
 import { useTranslation } from "react-i18next";
 import { useAdminClient } from "../admin-client";
 import { KeycloakDataTable } from "../components/table-toolbar/KeycloakDataTable";
+import { TableText } from "@patternfly/react-table";
 
 type OrganizationModalProps = {
+  isJoin?: boolean;
+  existingOrgs: OrganizationRepresentation[];
   onAdd: (orgs: OrganizationRepresentation[]) => Promise<void>;
   onClose: () => void;
 };
 
 export const OrganizationModal = ({
+  isJoin = true,
+  existingOrgs,
   onAdd,
   onClose,
 }: OrganizationModalProps) => {
@@ -21,13 +27,20 @@ export const OrganizationModal = ({
   const [selectedRows, setSelectedRows] = useState<UserRepresentation[]>([]);
 
   const loader = async (first?: number, max?: number, search?: string) => {
-    return await adminClient.organizations.find({ first, max, search });
+    const params = {
+      first,
+      search,
+      max: max! + existingOrgs.length,
+    };
+
+    const orgs = await adminClient.organizations.find(params);
+    return differenceBy(orgs, existingOrgs, "id");
   };
 
   return (
     <Modal
       variant={ModalVariant.small}
-      title={t("joinOrganization")}
+      title={isJoin ? t("joinOrganization") : t("sendInvitation")}
       isOpen
       onClose={onClose}
       actions={[
@@ -40,7 +53,7 @@ export const OrganizationModal = ({
             onClose();
           }}
         >
-          {t("join")}
+          {isJoin ? t("join") : t("send")}
         </Button>,
         <Button
           data-testid="cancel"
@@ -66,6 +79,9 @@ export const OrganizationModal = ({
           },
           {
             name: "description",
+            cellRenderer: (row) => (
+              <TableText wrapModifier="truncate">{row.description}</TableText>
+            ),
           },
         ]}
       />
diff --git a/js/apps/admin-ui/src/organizations/OrganizationTable.tsx b/js/apps/admin-ui/src/organizations/OrganizationTable.tsx
index 970eb92492..28c1beeb67 100644
--- a/js/apps/admin-ui/src/organizations/OrganizationTable.tsx
+++ b/js/apps/admin-ui/src/organizations/OrganizationTable.tsx
@@ -57,7 +57,9 @@ const Domains = (org: OrganizationRepresentation) => {
 };
 
 type OrganizationTableProps = PropsWithChildren & {
-  loader: LoaderFunction<OrganizationRepresentation>;
+  loader:
+    | LoaderFunction<OrganizationRepresentation>
+    | OrganizationRepresentation[];
   toolbarItem?: ReactNode;
   isPaginated?: boolean;
   onSelect?: (orgs: OrganizationRepresentation[]) => void;
diff --git a/js/apps/admin-ui/src/user/Organizations.tsx b/js/apps/admin-ui/src/user/Organizations.tsx
index f4eb2cf00f..15a99fb36a 100644
--- a/js/apps/admin-ui/src/user/Organizations.tsx
+++ b/js/apps/admin-ui/src/user/Organizations.tsx
@@ -17,6 +17,7 @@ import { useConfirmDialog } from "../components/confirm-dialog/ConfirmDialog";
 import { ListEmptyState } from "../components/list-empty-state/ListEmptyState";
 import { OrganizationModal } from "../organizations/OrganizationModal";
 import { OrganizationTable } from "../organizations/OrganizationTable";
+import { useFetch } from "../utils/useFetch";
 import useToggle from "../utils/useToggle";
 import { UserParams } from "./routes/User";
 
@@ -30,11 +31,19 @@ export const Organizations = () => {
   const refresh = () => setKey(key + 1);
 
   const [joinToggle, toggle, setJoinToggle] = useToggle();
-  const [joinOrganization, setJoinOrganization] = useState(false);
+  const [shouldJoin, setShouldJoin] = useState(true);
+  const [openOrganizationPicker, setOpenOrganizationPicker] = useState(false);
+  const [userOrgs, setUserOrgs] = useState<OrganizationRepresentation[]>([]);
   const [selectedOrgs, setSelectedOrgs] = useState<
     OrganizationRepresentation[]
   >([]);
 
+  useFetch(
+    () => adminClient.organizations.memberOrganizations({ userId: id! }),
+    setUserOrgs,
+    [key],
+  );
+
   const [toggleDeleteDialog, DeleteConfirm] = useConfirmDialog({
     titleKey: "removeConfirmOrganizationTitle",
     messageKey: t("organizationRemoveConfirm", { count: selectedOrgs.length }),
@@ -51,6 +60,7 @@ export const Organizations = () => {
           ),
         );
         addAlert(t("organizationRemovedSuccess"));
+        setSelectedOrgs([]);
         refresh();
       } catch (error) {
         addError("organizationRemoveError", error);
@@ -60,18 +70,29 @@ export const Organizations = () => {
 
   return (
     <>
-      {joinOrganization && (
+      {openOrganizationPicker && (
         <OrganizationModal
-          onClose={() => setJoinOrganization(false)}
+          isJoin={shouldJoin}
+          existingOrgs={userOrgs}
+          onClose={() => setOpenOrganizationPicker(false)}
           onAdd={async (orgs) => {
             try {
               await Promise.all(
-                orgs.map((org) =>
-                  adminClient.organizations.addMember({
-                    orgId: org.id!,
-                    userId: id!,
-                  }),
-                ),
+                orgs.map((org) => {
+                  const form = new FormData();
+                  form.append("id", id!);
+                  return shouldJoin
+                    ? adminClient.organizations.addMember({
+                        orgId: org.id!,
+                        userId: id!,
+                      })
+                    : adminClient.organizations.inviteExistingUser(
+                        {
+                          orgId: org.id!,
+                        },
+                        form,
+                      );
+                }),
               );
               addAlert(t("userAddedOrganization", { count: orgs.length }));
               refresh();
@@ -83,14 +104,13 @@ export const Organizations = () => {
       )}
       <DeleteConfirm />
       <OrganizationTable
-        key={key}
-        loader={() =>
-          adminClient.organizations.memberOrganizations({
-            userId: id!,
-          })
-        }
+        loader={userOrgs}
         onSelect={(orgs) => setSelectedOrgs(orgs)}
         deleteLabel="remove"
+        onDelete={(org) => {
+          setSelectedOrgs([org]);
+          toggleDeleteDialog();
+        }}
         toolbarItem={
           <>
             <ToolbarItem>
@@ -112,13 +132,20 @@ export const Organizations = () => {
                   <DropdownItem
                     key="join"
                     onClick={() => {
-                      setJoinOrganization(true);
+                      setShouldJoin(true);
+                      setOpenOrganizationPicker(true);
                     }}
                   >
                     {t("joinOrganization")}
                   </DropdownItem>
-                  <DropdownItem key="invite" component="button">
-                    {t("invite")}
+                  <DropdownItem
+                    key="invite"
+                    onClick={() => {
+                      setShouldJoin(false);
+                      setOpenOrganizationPicker(true);
+                    }}
+                  >
+                    {t("sentInvite")}
                   </DropdownItem>
                 </DropdownList>
               </Dropdown>
@@ -142,11 +169,17 @@ export const Organizations = () => {
           secondaryActions={[
             {
               text: t("joinOrganization"),
-              onClick: () => alert("join organization"),
+              onClick: () => {
+                setShouldJoin(true);
+                setOpenOrganizationPicker(true);
+              },
             },
             {
               text: t("sendInvitation"),
-              onClick: () => alert("send invitation"),
+              onClick: () => {
+                setShouldJoin(false);
+                setOpenOrganizationPicker(true);
+              },
             },
           ]}
         />
diff --git a/js/libs/keycloak-admin-client/src/resources/organizations.ts b/js/libs/keycloak-admin-client/src/resources/organizations.ts
index 3a07e17537..f5208aae2e 100644
--- a/js/libs/keycloak-admin-client/src/resources/organizations.ts
+++ b/js/libs/keycloak-admin-client/src/resources/organizations.ts
@@ -111,6 +111,15 @@ export class Organizations extends Resource<{ realm?: string }> {
     urlParamKeys: ["orgId"],
   });
 
+  public inviteExistingUser = this.makeUpdateRequest<
+    { orgId: string },
+    FormData
+  >({
+    method: "POST",
+    path: "/{orgId}/members/invite-existing-user",
+    urlParamKeys: ["orgId"],
+  });
+
   public listIdentityProviders = this.makeRequest<
     { orgId: string },
     IdentityProviderRepresentation[]