cfml

what's the easiest way to tell a box server to switch from lucee to acf? ie, i did a 'box server start' in a directory and it worked fine, but i need to test something in acf now

This is the simplest
```CommandBox&gt; start cfengine=adobe@2021```

if you are not in Commandbox environment in CLI, then
```&gt;box start cfengine=adobe@2021```

trying now - i thought since it was lucee before id have to edit something. dang tooting - seems to be working - thank you

<https://commandbox.ortusbooks.com/embedded-server/multi-engine-support>

<@U078R1NGK> It depends on whether you still want the other server or not.  If you don't care, then you can just do
```server stop
start cfengine=...```
which automatically updates your `server.json` file for you.  If you want to test on both a Lucee and Adobe server side by side, then I'd start each server with a name
```start name=test1 cfengine=lucee
start name=test2 cfengine=adobe ```
 which will create two server.json files
• server-test1.json
• server-test2.json