> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/ras-powershell-api-guide/v19/api-versions.md).

# API Versions

In Parallels RAS 19.3 the PowerShell module is named RASAdmin and it supports version 4.0 (latest), version 3.0 and version 2.0.

## Version 4.0

This version is the one loaded by default by the system or if the RequiredVersion is not specified when importing the module.

## Backward Compatibility

This version keeps backward compatibility with the older RASAdmin modules found in previous versions.\
It allows administrators to use existing scripts with minor modification.\
\
To make use of a previous version, one needs to specify the *RequiredVersion* (eg. 3.0) when importing the module:

```
Import-Module RASAdmin -RequiredVersion 3.0
```

## **Versions**

* Version 3.0 - Parallels RAS 19
* Version 2.0 - Parallels RAS 18

## **Includes**

* Cmdlet aliases
* Aliased parameters
* Old and new properties in the returned objects

#### Changes between Version 4.0 and Version 3.0

The below sections highlight the differences between Version 4.0 and Version 3.0.

* [New Cmdlets](https://download.parallels.com/ras/v19/docs/en_US/Parallels-RAS-v19-PowerShell-Guide/apiversions/index.html#NewCmdlets)
* [Modified Cmdlets](https://download.parallels.com/ras/v19/docs/en_US/Parallels-RAS-v19-PowerShell-Guide/apiversions/index.html#ModifiedCmdlets)
* [Removed Cmdlets](https://download.parallels.com/ras/v19/docs/en_US/Parallels-RAS-v19-PowerShell-Guide/apiversions/index.html#RemovedCmdlets)
* [Modified Outputs](https://download.parallels.com/ras/v19/docs/en_US/Parallels-RAS-v19-PowerShell-Guide/apiversions/index.html#ModifiedOutputs)


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