Hi @RubyM.45323 (Customer)​ , Thank you for reaching out to the Okta Community!

The context is not clear here so I'm operating based on what I consider common assumptions when I suggest the following example syntaxes. 

I also want to mention the following caveats: 

• the attributes mentioned in the context of user.* or appuser.* use the variable names mentioned under your Okta Admin Dashboard → Directory → Profile Editor and are case sensitive.
• "empty" does not not mean "null" - as such the following syntaxes are dependent on the "isContractor" attribute to not be null (to clarify - it must have had a value at some point) - otherwise the syntaxes do not work.  
• attribute mapping only works from App to Okta OR Okta to App NOT Okta to Okta.  

APP ==> OKTA Mapping

(appuser.nonConformingEmailAddress =="" OR appuser.nonConformingEmailAddress ==null) AND appuser.isContractor == "" ? appuser.PreferredLastName + "@domian.com" : (appuser.nonConformingEmailAddress =="" OR appuser.nonConformingEmailAddress ==null) AND appuser.isContractor != "" ? appuser.PreferredLastName + "@SecondDomian.com" : appuser.nonConformingEmailAddress

OKTA ==> APP mapping

(user.nonConformingEmailAddress =="" OR user.nonConformingEmailAddress ==null) AND user.isContractor == "" ? user.PreferredLastName + "@domian.com" : (user.nonConformingEmailAddress =="" OR user.nonConformingEmailAddress ==null) AND user.isContractor != "" ? user.PreferredLastName + "@SecondDomian.com" : user.nonConformingEmailAddress

If my answer helped, remember to mark it as best to increase its visibility for other members of the Okta Community who might have the same questions as you. 

Hope my answer helps! 

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