# 50413: Account is not authorized to use proxy address

Log Level: ERROR

## Description

Your account is not authorized to use the requested proxy address.

### Possible causes

* The provided conversation proxy address is not allowed to be used under your account.

### Possible solutions

* Check that MessagingBinding.ProxyAddress parameter passed to API contains a proxy address that belongs to your account. For example, use a Twilio phone number that is purchased under the same project.