Standard fields to stop updating from Salesforce to Marketo | Community
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Gayathiry1
Level 3
April 10, 2026
Solved

Standard fields to stop updating from Salesforce to Marketo

  • April 10, 2026
  • 1 reply
  • 19 views

Hi All,
 

Please share your thoughts - 

Scenario 1 - Is there a way to stop the updates from Salesforce to Marketo - Example - email address - when there is an update in the email address in SF will it create a duplicate in Marketo?

Scenario 2 - How many person records can we create in Marketo with the same email address?

Thanks in Advance!

Best answer by Darshil_Shah1

Taking a step back here - what's the use case behind updating the Email Address in Salesforce in the first place?  If the email address is changed in Salesforce, Marketo will update the same person record (matched via SFDC Lead/Contact ID). A duplicate record would only be created if A new Lead/Contact is created in Salesforce with the same email, or Records are inserted into Marketo via API/import using a different dedupe key (if you have a custom dedupe key in Marketo). 

 

Coming to your 2nd question: Marketo does not enforce uniqueness on email addresses, so you can have multiple person records with the same email, and each record is uniquely identified by Lead ID, not email. At send/update time, Marketo will deduplicate by email, so only one email is sent. You should go through the implications of duplicate records in Marketo. But again, taking a step back, do you really need duplicate records in your Marketo DB, however purposeful, after a certain point and volume, working with duplicate records becomes really difficult. All in all, Marketo allows duplicate emails, but it’s not recommended operationally

1 reply

Darshil_Shah1
Community Advisor and Adobe Champion
Darshil_Shah1Community Advisor and Adobe ChampionAccepted solution
Community Advisor and Adobe Champion
April 10, 2026

Taking a step back here - what's the use case behind updating the Email Address in Salesforce in the first place?  If the email address is changed in Salesforce, Marketo will update the same person record (matched via SFDC Lead/Contact ID). A duplicate record would only be created if A new Lead/Contact is created in Salesforce with the same email, or Records are inserted into Marketo via API/import using a different dedupe key (if you have a custom dedupe key in Marketo). 

 

Coming to your 2nd question: Marketo does not enforce uniqueness on email addresses, so you can have multiple person records with the same email, and each record is uniquely identified by Lead ID, not email. At send/update time, Marketo will deduplicate by email, so only one email is sent. You should go through the implications of duplicate records in Marketo. But again, taking a step back, do you really need duplicate records in your Marketo DB, however purposeful, after a certain point and volume, working with duplicate records becomes really difficult. All in all, Marketo allows duplicate emails, but it’s not recommended operationally

    G
    Gayathiry1Author
    Level 3
    April 10, 2026

    Thanks ​@Darshil_Shah1 for your quick and clear response! 

    For Q1 - let me ask the business scenario for confirmation, 

    For Q2 - is there any limit in Marketo to create person records with same email address? I think it’s 2 right? please correct me.

    Thanks in Advance!

    C
    Community Advisor and Adobe Champion
    ChristianeRo1Community Advisor and Adobe Champion
    Community Advisor and Adobe Champion
    April 10, 2026

    There’s no limit to the number of duplicate records you can create with the same email address -- but as ​@Darshil_Shah1 has mentioned, you should really think about why you might want duplicate emails. One additional record with the same email is hard enough to handle, let alone more than that. 

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