Hi Petyr,
Are you sure you have upgraded to the lastest version of MSI?
On my instance, it works well:
My MSI version number is 1.4359.2
-Greg
Gregoire,
Thanks again for your response. I do have the view you included in your snapshot. I looked at my question again and I realized it wasn't clear.
The buttons I'm referring to appear on the tab list views in SFDC. When you switch to SFDC lightning, they longer appear. I assume it's because these buttons are javascript based and SFDC Lighting does not support javascript buttons. It would be great to know when Marketo plans to address this issue so the functionality in SFDC Lightning is the same in Classic. thanks for your help.
In case anyone else stumbles across this, here's my solution:
Build a visualforce page with this code for contacts:
<apex:page standardController="Contact" recordSetVar="AllContacts">
<apex:includeScript value="/soap/ajax/30.0/connection.js"/>
<apex:includeScript value="/soap/ajax/30.0/apex.js"/>
<script>
sforce.connection.sessionId = "{!$Api.Session_ID}";
var idArr = [];
list = "{!Selected}"
list = list.replace("[","").replace("]","")
idArr = list.split(", ");
if (idArr[0] == null){
alert('Please select at least one row');
}
else {
var value = new Array();
value[0] = new String(idArr);
var mname = new Array();
mname[0] = "contactIds";
var key =
sforce.apex.execute(
"mkto_si.LongGetMethodArguHandler",
"putArgus",
{
name : mname,
value : value,
contactType : "Contact"
}
);
try {
var key = sforce.apex.execute("mkto_si.LongGetMethodArguHandler", "putArgus", { name:mname, value:value, contactType:"Contact" });
window.top.location = "/apex/mkto_si__Send_Marketo_Email?contactType=Contact&key=" + key +"&retUrl=" + encodeURIComponent(document.location.href);
}
catch(err) {
window.top.location = "/apex/mkto_si__Send_Marketo_Email?contactType=Contact&contactIds=" + idArr +"&retUrl=" + encodeURIComponent(document.location.href);
}
}
</script>
</apex:page>
Or this code for leads:
<apex:page standardController="Lead" recordSetVar="AllLeads">
<apex:includeScript value="/soap/ajax/30.0/connection.js"/>
<apex:includeScript value="/soap/ajax/30.0/apex.js"/>
<script>
sforce.connection.sessionId = "{!$Api.Session_ID}";
var idArr = [];
list = "{!Selected}"
list = list.replace("[","").replace("]","")
idArr = list.split(", ");
if (idArr[0] == null){
alert('Please select at least one row');
}
else {
var value = new Array();
value[0] = new String(idArr);
var mname = new Array();
mname[0] = "contactIds";
var key =
sforce.apex.execute(
"mkto_si.LongGetMethodArguHandler",
"putArgus",
{
name : mname,
value : value,
contactType : "Lead"
}
);
try {
var key = sforce.apex.execute("mkto_si.LongGetMethodArguHandler", "putArgus", { name:mname, value:value, contactType:"Lead" });
window.top.location = "/apex/mkto_si__Send_Marketo_Email?contactType=Lead&key=" + key +"&retUrl=" + encodeURIComponent(document.location.href);
}
catch(err) {
window.top.location = "/apex/mkto_si__Send_Marketo_Email?contactType=Lead&contactIds=" + idArr +"&retUrl=" + encodeURIComponent(document.location.href);
}
}
</script>
</apex:page>
Then create a new list view button with your visualforce page as the content source:
Then add the new button to the list view.
It takes a second to load, same as the classic button, but because you're sitting on the visualforce page instead of the list, I also added a "One moment please...." message to the page to pacify impatient users.
Hope that helps someone in the future. 
Better to highlight your code so it's readable using the Advanced Editor's syntax highlighter. (And thanks for the contribution.)
Thanks! Much better.
I do see an unreachable condition in your code.
When you split() a String, even an empty String, on a non-empty delimiter, it's not possible for the first item in the resulting array to ever loose-equal (nor strict-equal) null.
That is, list is always a String here to start:
var idArr = [];
list = "{!Selected}";
list = list.replace("[","").replace("]","")
idArr = list.split(", ");
(You probably meant var list = "{!Selected}" but that doesn't change the outcome.)
And even if list is an empty String to start, after the split idArr will be
[""]and thus idArr[0] is
""which does not equal null, so this condition will never be met:
if (idArr[0] == null){
alert('Please select at least one row');
}
It seems like you're trying to catch when the original String list was empty, for which it's better to force idArr to be an empty Array -- rather than an Array with 1 element that's an empty String.
You can do that like so (w/a little other refactoring as well):
var list = "{!Selected}",
idArr = list.split(/^\[|, |\]$/).filter(Boolean);
if (!idArr.length) {
alert("Please select at least one row");
}
Now if list starts out empty, the resulting idArr is an empty Array (Array of length 0). If list is non-empty, then idArr has 1 or more String items.
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