# SMS API Error 135: "You cannot have access to another user" with Admin-Managed App

**URL:** <https://devforum.zoom.us/t/sms-api-error-135-you-cannot-have-access-to-another-user-with-admin-managed-app/136806>\
**Category:** API and Webhooks\
**Created:** [August 23, 2025, 11:57am UTC](https://devforum.zoom.us/t/sms-api-error-135-you-cannot-have-access-to-another-user-with-admin-managed-app/136806 "2025-08-23T11:57:21Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![russmcbride](https://avatars.discourse-cdn.com/v4/letter/r/bc8723/32.png) [@russmcbride](https://devforum.zoom.us/u/russmcbride)\
**Post date:** [August 23, 2025, 11:57am UTC](https://devforum.zoom.us/t/sms-api-error-135-you-cannot-have-access-to-another-user-with-admin-managed-app/136806/1 "2025-08-23T11:57:21Z")

</div>

### I’m building a Zapier integration using Zoom’s SMS API (`POST /phone/sms/messages`) and encountering Error 135 when trying to send SMS on behalf of other users in our organization.

## Current Setup

- **App Type** : Admin-managed

- **Scopes** : `user:read:admin` and `phone:read:sms_message`

- **Authorization** : Done by Zoom account admin

- **API Endpoint** : `https://api.zoom.us/v2/phone/sms/messages`

## What Works

- ✅ Sending SMS from the **authenticated admin user’s** phone number works perfectly

- ✅ API authentication is successful

- ✅ Basic SMS functionality is working

## What Doesn’t Work

- ❌ Sending SMS on behalf of **other users** in the same Zoom account returns Error 135

- ❌ Using other users’ `phone_user_id` in the sender object fails

## Request Body Structure

json

```auto
{
  "message": "Test message",
  "to_members": [
    {
      "phone_number": "+1234567890"
    }
  ],
  "sender": {
    "user_id": "8umOrlLzSZmghxw6_lnYvw" // This is the phone_user_id from /phone/users
  }
}

```

## Key Details

1. **User ID Format** : I’m using the `phone_user_id` from the `/phone/users` endpoint, not the regular Zoom `user_id`

2. **Same Account** : The target user is in the same Zoom account as the admin who authorized the app

3. **Phone License** : The target user has an active Zoom Phone license and assigned phone number

4. **Permissions** : The app has admin-level scopes and was authorized by an account admin

## Questions

1. **Are additional scopes required** for cross-user SMS sending beyond `phone:read:sms_message`?

2. **Is there a specific permission or setting** in the Zoom Admin Console that needs to be enabled?

3. **Should I be using a different user ID format** for the sender object?

4. **Are there account-level restrictions** that prevent admin apps from sending SMS on behalf of other users?

## Error Response

json

```auto
{
  "code": 135,
  "message": "You cannot have access to another user."
}

```

Any guidance on the correct configuration for cross-user SMS functionality would be greatly appreciated!

## Environment

- Integration: Third-party (Zapier)

- App Category: Admin-managed OAuth app

- Account Type: Business/Enterprise with Zoom Phone

---

<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [August 28, 2025, 4:35pm UTC](https://devforum.zoom.us/t/sms-api-error-135-you-cannot-have-access-to-another-user-with-admin-managed-app/136806/2 "2025-08-28T16:35:03Z")

</div>

hi @russmcbride  
Thanks for reaching out to us.  
This is expected behavior. As of right now, SMS’s can’t be sent on behalf of other users.

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<div class="post-metadata">

**Author:** ![omar.delgado](https://avatars.discourse-cdn.com/v4/letter/o/ee7513/32.png) [@omar.delgado](https://devforum.zoom.us/u/omar.delgado)\
**Post date:** [September 4, 2025, 12:03am UTC](https://devforum.zoom.us/t/sms-api-error-135-you-cannot-have-access-to-another-user-with-admin-managed-app/136806/3 "2025-09-04T00:03:21Z")

</div>

I had this issue and I create the new app using the user I wanted to send the SMS.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [September 5, 2025, 12:03am UTC](https://devforum.zoom.us/t/sms-api-error-135-you-cannot-have-access-to-another-user-with-admin-managed-app/136806/4 "2025-09-05T00:03:42Z")

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Closed on September 5, 2025, 12:03am UTC

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