diff --git a/server/internal/logic/sys/im_admin_scope.go b/server/internal/logic/sys/im_admin_scope.go
index a1ee539..8022642 100644
--- a/server/internal/logic/sys/im_admin_scope.go
+++ b/server/internal/logic/sys/im_admin_scope.go
@@ -39,7 +39,7 @@ func resolveImAdminScopeWithAll(ctx context.Context, selectedTenantId int64, all
 	scope.OperatorId = operatorId
 	scope.RoleKey = contexts.GetRoleKey(ctx)
 	scope.RequestId = gctx.CtxId(ctx)
-	if service.AdminMember().VerifySuperId(ctx, operatorId) {
+	if isImPlatformAdmin(ctx, operatorId) {
 		if selectedTenantId <= 0 {
 			if allowAll {
 				return scope, nil
@@ -53,12 +53,12 @@ func resolveImAdminScopeWithAll(ctx context.Context, selectedTenantId int64, all
 		return scope, nil
 	}
 
-	if contexts.GetDeptType(ctx) != consts.DeptTypeTenant {
-		return scope, gerror.New("当前账号不是租户管理员，不能管理邀请码")
+	if !contexts.IsTenantDept(ctx) {
+		return scope, gerror.New("当前账号无权管理IM租户")
 	}
-	tenantId := contexts.GetTenantId(ctx)
-	if tenantId <= 0 {
-		return scope, gerror.New("当前管理员未关联租户")
+	tenantId, err := resolveImAdminBoundTenant(ctx)
+	if err != nil {
+		return scope, err
 	}
 	if err = ensureImTenantActive(ctx, tenantId); err != nil {
 		return scope, err
@@ -67,6 +67,21 @@ func resolveImAdminScopeWithAll(ctx context.Context, selectedTenantId int64, all
 	return scope, nil
 }
 
+func isImPlatformAdmin(ctx context.Context, operatorId int64) bool {
+	if contexts.IsCompanyDept(ctx) {
+		return true
+	}
+	return service.AdminMember().VerifySuperId(ctx, operatorId)
+}
+
+func resolveImAdminBoundTenant(ctx context.Context) (int64, error) {
+	tenantId := contexts.GetTenantId(ctx)
+	if tenantId <= 0 {
+		return 0, gerror.New("当前管理员未关联IM租户")
+	}
+	return tenantId, nil
+}
+
 func ensureImTenantActive(ctx context.Context, tenantId int64) (err error) {
 	var tenant *entity.ImTenant
 	if err = imtenant.RegistryDB().Model(dao.ImTenant.Table()).Safe().Ctx(ctx).WherePri(tenantId).Scan(&tenant); err != nil {
diff --git a/server/internal/logic/sys/im_admin_scope_test.go b/server/internal/logic/sys/im_admin_scope_test.go
new file mode 100644
index 0000000..4b8e97d
--- /dev/null
+++ b/server/internal/logic/sys/im_admin_scope_test.go
@@ -0,0 +1,57 @@
+package sys
+
+import (
+	"context"
+	"testing"
+
+	"hotgo/internal/consts"
+	"hotgo/internal/model"
+)
+
+func TestCompanyDepartmentIsImPlatformAdmin(t *testing.T) {
+	ctx := context.WithValue(context.Background(), consts.ContextHTTPKey, &model.Context{
+		User: &model.Identity{Id: 14, TenantId: 1, DeptType: consts.DeptTypeCompany, RoleKey: "imManage"},
+	})
+	if !isImPlatformAdmin(ctx, 14) {
+		t.Fatal("expected company department IM manager to use platform tenant selection")
+	}
+}
+
+func TestResolveImAdminBoundTenant(t *testing.T) {
+	tests := []struct {
+		name     string
+		identity *model.Identity
+		want     int64
+	}{
+		{
+			name: "tenant department with tenant binding",
+			identity: &model.Identity{
+				TenantId: 2,
+				DeptType: consts.DeptTypeTenant,
+			},
+			want: 2,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx := context.WithValue(context.Background(), consts.ContextHTTPKey, &model.Context{User: tt.identity})
+			got, err := resolveImAdminBoundTenant(ctx)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if got != tt.want {
+				t.Fatalf("tenant binding mismatch: got %d, want %d", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestResolveImAdminBoundTenantRejectsUnboundAccount(t *testing.T) {
+	ctx := context.WithValue(context.Background(), consts.ContextHTTPKey, &model.Context{
+		User: &model.Identity{DeptType: consts.DeptTypeTenant, RoleKey: "tenantManager"},
+	})
+	if _, err := resolveImAdminBoundTenant(ctx); err == nil {
+		t.Fatal("expected unbound account to be rejected")
+	}
+}