Custom Button URL using IF condition found on Salesforce doc but not working

Question

I am trying to create a custom button redirecting either to :

• the correct LinkedIn profile if the LinkedIn ID is filled
• a LinkedIn search using First Name & Last Name

So far, here is what I have :

{!
IF(len(Contact.LinkedIn_ID__c)=0,
"http://www.linkedin.com/search/results/people/keywords="&Contact.FirstName&"%20"&Contact.LastName,
"http://www.linkedin.com/in/"&Contact.LinkedIn_ID__c)
}

Whenever I click the button, I am redirected to a new Salesforce page with the following error : "This page isn't available in Salesforce Lightning Experience or mobile app."

I have found a Salesforce doc using the same kind of formula :

{! 
IF(Sample.BillingCountry = "US", 
"http://maps.google.com/maps?q=​"&Sample.BillingStreet&​
"+"&Sample.BillingCity&"+​"&Sample.BillingState&"+​"&Sample.BillingCountry, 
(IF(Sample.BillingCountry = "UK", 
"http://maps.google.co.uk/maps?q=​"&Sample.BillingStreet
&​"+"&Sample.BillingCity&​"+​"&Sample.BillingCountry, 
"http://maps.google.com"))) 
}

What am I doing wrong ?

Answer 1

This works for me (both Classic and Lex)

• Detail Page button

• Behavior: Display in new Window

• Content Source: URL

  {!IF(ISBLANK(Contact.LinkedIn__c),
    URLFOR('http://www.linkedin.com/search/results/people', NULL, [keywords=Contact.FirstName & ' ' & Contact.LastName]),
    URLFOR('http://www.linkedin.com/in/' & Contact.LinkedIn__c,NULL)
    )
   }