# Tenant Broker compatibility and updates

When updating Parallels RAS to a newer version, the following rules apply to the RAS Multi-Tenant architecture:

* Parallels RAS Tenant Broker supports Tenants up to two major RAS versions older. For example, if you upgrade RAS Tenant Broker from RAS 17 to RAS 18 (or the next major version when it becomes available), it will support Tenants running Parallels RAS 17.
* When doing updates, you should first update the Tenant Broker, so your RAS Multi-Tenant installation remains fully operational. You can update Tenants later during their own maintenance window.


---

# 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.parallels.com/landing/ras-admin-guide/v19-en-us/parallels-ras-19-administrators-guide/ras-multi-tenant-architecture/tenant-broker-compatibility-and-updates.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.