Number of custom fields

[Amber_Hobson]

I know there is a limit on the number of custom fields we can have within Marketo that are not in Salesforce, but how many is that? And is there a way to see what my custom fields are?

[Anonymous]

I have never heard of a limit for custom fields within Marketo.  Perhaps someone with greater knowledge on that can chime in.  If I am understanding you correctly, you can view all the fields that are within MTKO (including custom) in the Field Management section of the Admin area:

[Amber_Hobson]

But, how do you know if the field is Marketo only and not in Salesforce? We're trying to find the difference between those.

[Anonymous]

If you click on the field, and the SFDC Field Map is blank, then you know that it is only in Marketo: