Rex syntax to define result data

[jsturgeon]

Hello, 
I am looking to clean up the result data from a Splunk query.
How do I remove all the text prior to the user name at the end of the line?

Server1234.prod.outlook.com/Microsoft Exchange Hosted Organizations/MyOrg.onmicrosoft.com/Smith, Joe

I want the results to just return "Smith, Joe"

thoughts?

[efika]

| makeresults 1 
| eval _raw="Server1234.prod.outlook.com/Microsoft Exchange Hosted Organizations/MyOrg.onmicrosoft.com/Smith, Joe" 
| rex mode=sed "s/.*\///g" 
| table _raw