diff --git a/extensions/msteams/src/channel.runtime.ts b/extensions/msteams/src/channel.runtime.ts
index 4e90f394bb2..4de6a10a046 100644
--- a/extensions/msteams/src/channel.runtime.ts
+++ b/extensions/msteams/src/channel.runtime.ts
@@ -2,6 +2,7 @@ import {
   listMSTeamsDirectoryGroupsLive as listMSTeamsDirectoryGroupsLiveImpl,
   listMSTeamsDirectoryPeersLive as listMSTeamsDirectoryPeersLiveImpl,
 } from "./directory-live.js";
+import { getMemberInfoMSTeams as getMemberInfoMSTeamsImpl } from "./graph-members.js";
 import {
   getMessageMSTeams as getMessageMSTeamsImpl,
   listPinsMSTeams as listPinsMSTeamsImpl,
@@ -23,6 +24,7 @@ import {
 export const msTeamsChannelRuntime = {
   deleteMessageMSTeams: deleteMessageMSTeamsImpl,
   editMessageMSTeams: editMessageMSTeamsImpl,
+  getMemberInfoMSTeams: getMemberInfoMSTeamsImpl,
   getMessageMSTeams: getMessageMSTeamsImpl,
   listPinsMSTeams: listPinsMSTeamsImpl,
   listReactionsMSTeams: listReactionsMSTeamsImpl,
diff --git a/extensions/msteams/src/channel.ts b/extensions/msteams/src/channel.ts
index 87c480aea97..c4c4794d424 100644
--- a/extensions/msteams/src/channel.ts
+++ b/extensions/msteams/src/channel.ts
@@ -329,6 +329,7 @@ function describeMSTeamsMessageTool({
           "react",
           "reactions",
           "search",
+          "member-info",
         ] satisfies ChannelMessageActionName[])
       : [],
     capabilities: enabled ? ["cards"] : [],
@@ -842,6 +843,16 @@ export const msteamsPlugin: ChannelPlugin<ResolvedMSTeamsAccount, ProbeMSTeamsRe
             });
           }
 
+          if (ctx.action === "member-info") {
+            const userId = typeof ctx.params.userId === "string" ? ctx.params.userId.trim() : "";
+            if (!userId) {
+              return actionError("member-info requires a userId.");
+            }
+            const { getMemberInfoMSTeams } = await loadMSTeamsChannelRuntime();
+            const result = await getMemberInfoMSTeams({ cfg: ctx.cfg, userId });
+            return jsonMSTeamsOkActionResult("member-info", result);
+          }
+
           // Return null to fall through to default handler
           return null as never;
         },
diff --git a/extensions/msteams/src/graph-members.test.ts b/extensions/msteams/src/graph-members.test.ts
new file mode 100644
index 00000000000..c82ea01f3cc
--- /dev/null
+++ b/extensions/msteams/src/graph-members.test.ts
@@ -0,0 +1,91 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import type { OpenClawConfig } from "../runtime-api.js";
+import { getMemberInfoMSTeams } from "./graph-members.js";
+
+const mockState = vi.hoisted(() => ({
+  resolveGraphToken: vi.fn(),
+  fetchGraphJson: vi.fn(),
+}));
+
+vi.mock("./graph.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("./graph.js")>();
+  return {
+    ...actual,
+    resolveGraphToken: mockState.resolveGraphToken,
+    fetchGraphJson: mockState.fetchGraphJson,
+  };
+});
+
+const TOKEN = "test-graph-token";
+
+describe("getMemberInfoMSTeams", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockState.resolveGraphToken.mockResolvedValue(TOKEN);
+  });
+
+  it("fetches user profile and maps all fields", async () => {
+    mockState.fetchGraphJson.mockResolvedValue({
+      id: "user-123",
+      displayName: "Alice Smith",
+      mail: "alice@contoso.com",
+      jobTitle: "Engineer",
+      userPrincipalName: "alice@contoso.com",
+      officeLocation: "Building 1",
+    });
+
+    const result = await getMemberInfoMSTeams({
+      cfg: {} as OpenClawConfig,
+      userId: "user-123",
+    });
+
+    expect(result).toEqual({
+      user: {
+        id: "user-123",
+        displayName: "Alice Smith",
+        mail: "alice@contoso.com",
+        jobTitle: "Engineer",
+        userPrincipalName: "alice@contoso.com",
+        officeLocation: "Building 1",
+      },
+    });
+    expect(mockState.fetchGraphJson).toHaveBeenCalledWith({
+      token: TOKEN,
+      path: `/users/${encodeURIComponent("user-123")}?$select=id,displayName,mail,jobTitle,userPrincipalName,officeLocation`,
+    });
+  });
+
+  it("handles sparse data with some fields undefined", async () => {
+    mockState.fetchGraphJson.mockResolvedValue({
+      id: "user-456",
+      displayName: "Bob",
+    });
+
+    const result = await getMemberInfoMSTeams({
+      cfg: {} as OpenClawConfig,
+      userId: "user-456",
+    });
+
+    expect(result).toEqual({
+      user: {
+        id: "user-456",
+        displayName: "Bob",
+        mail: undefined,
+        jobTitle: undefined,
+        userPrincipalName: undefined,
+        officeLocation: undefined,
+      },
+    });
+  });
+
+  it("propagates Graph API errors", async () => {
+    mockState.fetchGraphJson.mockRejectedValue(new Error("Graph API 404: user not found"));
+
+    await expect(
+      getMemberInfoMSTeams({
+        cfg: {} as OpenClawConfig,
+        userId: "nonexistent-user",
+      }),
+    ).rejects.toThrow("Graph API 404: user not found");
+  });
+});
diff --git a/extensions/msteams/src/graph-members.ts b/extensions/msteams/src/graph-members.ts
new file mode 100644
index 00000000000..6c2b24b3eab
--- /dev/null
+++ b/extensions/msteams/src/graph-members.ts
@@ -0,0 +1,48 @@
+import type { OpenClawConfig } from "../runtime-api.js";
+import { fetchGraphJson, resolveGraphToken } from "./graph.js";
+
+type GraphUserProfile = {
+  id?: string;
+  displayName?: string;
+  mail?: string;
+  jobTitle?: string;
+  userPrincipalName?: string;
+  officeLocation?: string;
+};
+
+export type GetMemberInfoMSTeamsParams = {
+  cfg: OpenClawConfig;
+  userId: string;
+};
+
+export type GetMemberInfoMSTeamsResult = {
+  user: {
+    id: string | undefined;
+    displayName: string | undefined;
+    mail: string | undefined;
+    jobTitle: string | undefined;
+    userPrincipalName: string | undefined;
+    officeLocation: string | undefined;
+  };
+};
+
+/**
+ * Fetch a user profile from Microsoft Graph by user ID.
+ */
+export async function getMemberInfoMSTeams(
+  params: GetMemberInfoMSTeamsParams,
+): Promise<GetMemberInfoMSTeamsResult> {
+  const token = await resolveGraphToken(params.cfg);
+  const path = `/users/${encodeURIComponent(params.userId)}?$select=id,displayName,mail,jobTitle,userPrincipalName,officeLocation`;
+  const user = await fetchGraphJson<GraphUserProfile>({ token, path });
+  return {
+    user: {
+      id: user.id,
+      displayName: user.displayName,
+      mail: user.mail,
+      jobTitle: user.jobTitle,
+      userPrincipalName: user.userPrincipalName,
+      officeLocation: user.officeLocation,
+    },
+  };
+}