Kenny_Elkington

Marketo will not sync any custom fields for Campaign or Campaign Members, so you won't see any difference in performance from it, but it is always good practice to hide fields from users where they won't be necessary.

Do you have an example request which is failing (feel free to redact any sensitive info), and the response from DescribeMObjects for this type?

https://app-****.marketo.com/leadDatabase/loadLeadDetail?leadId={{lead.ID}} should work, just replace **** with whatever it says there when logged into Marketo. They will need to be logged into Marketo for the link to work properly though.

There are currently no plans to offer global client ids to applications, but we are planning to add support for simplified three-legged OAuth for partner applications. We don't have a specific release planned yet, however.

This can happen as noted in the docs: Get Lead Activities » Marketo Developers There may be additional results, but the database search for activities was halted to return in a timely manner instead of the call timing out. You can continue paging as normal, but depending on the tiype of activities,...

periods indicate classes in css selectors, you want #videoSection.

Yes, connections will work with newer versions of CRM.

This is set through the field acquisitionProgramId. You need to know the ID of the program which you can get with the program api: http://developers.marketo.com/documentation/programs/get-program-by-name/ You should cache the results for program IDs wherever possible so that you're not hitting the ...

Correct.

SFDC History objects don't have the SystemModStamp field, so they aren't compatible with the Marketo Custom Object sync.