# Backend API Version 15.0.23

## Enhancements & Benefits

* KA-3423: The server will allow all access currently reserved to restrict and sync down

## Bug Fixes

* KA-3448: Fix to allow Admin to invite a user to an enterprise when the user exists in a different region
* KA-3436: When a user provides the 6-digit code for DUO 2FA, the response displays an error message
* KA-3420: When a user creates a Business trial and switches regions, they receive and error message when attempting email verification


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.keeper.io/release-notes/jp/backend/backend-api/older/backend-api-version-15.0.23.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.