The Scenario
You are a growth analyst at a SaaS company. Your product team ran a survey last quarter and got 2,000 responses. The survey asked each respondent about their account tier: Free, Growth, or Enterprise.
You have the survey responses in an Excel workbook on the Survey tab: email in column A, account tier in column B. You need to update the "Account Tier" custom field in Constant Contact for all 2,000 contacts before the next segmented campaign goes out Monday.
It is Thursday afternoon.
The bad version of this update:
- Export 2,000 contacts from Constant Contact with their custom fields
- Add a column for the new account tier values from the survey
- Re-import the CSV with the updated custom field
- Watch the import fail for contacts where the email does not match exactly
- Debug the mismatches, fix and re-upload
- Monday: 200 contacts still have the wrong tier because of email casing differences.
The fast version is one prompt.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your Excel workbook that updates Constant Contact custom fields row by row, directly from the workbook.
Open the SheetXAI sidebar and type:
Update the Constant Contact custom field 'Account Tier' for each contact in the Survey tab using the email in column A and the value in column B. Write the status for each row into column C.
SheetXAI reads all 2,000 rows from the Survey tab, looks up each contact by email in Constant Contact, updates the Account Tier custom field, and writes a status into column C.
What You Get
2,000 contacts with updated custom fields in Constant Contact, and a status column in the Survey tab:
- "Updated" — Account Tier custom field changed to the new value
- "No change" — contact already had this value
- "Contact not found" — email does not match any contact in Constant Contact
Email casing does not matter. SheetXAI matches contacts case-insensitively.
What If the Data Is Not Quite Ready
Survey exports and contact lists rarely match perfectly. SheetXAI handles the edge cases in the same prompt.
When the account tier values in the workbook do not match Constant Contact's expected values
The survey allowed free-text answers and respondents typed variations.
Normalize the values in column B of the Survey tab: convert 'free', 'FREE', 'f' to 'Free'; 'growth', 'GROWTH', 'g' to 'Growth'; 'enterprise', 'ENTERPRISE', 'ent' to 'Enterprise'. Then update the Constant Contact custom field 'Account Tier' for each contact using the email in column A and the normalized value.
When you need to update multiple custom fields at once
The survey also captured company size. You want to update both in one pass.
For each row in the Survey tab, update the Constant Contact contact matching the email in column A. Set the custom field 'Account Tier' to the value in column B and the custom field 'Company Size' to the value in column C. Write the status into column D.
When contacts who do not exist should be created before updating
Some survey respondents are not yet in Constant Contact.
For each row in the Survey tab, find the Constant Contact contact matching the email in column A. If the contact exists, update the custom field 'Account Tier' to the value in column B. If not, create the contact and then set the custom field. Write the status into column C.
When you need to update custom fields, apply a tag, and add to a list, all in one pass
Enterprise-tier contacts should also get the tag "High Value" and be added to the "Enterprise Nurture" list.
For each row in the Survey tab, update the Constant Contact custom field 'Account Tier' using email in column A and value in column B. If the value in column B is 'Enterprise', also apply the tag 'High Value' and add the contact to the list named 'Enterprise Nurture'. Write the full status into column C.
The pattern: instead of a CSV round-trip for every custom field update, you describe the update in the prompt and SheetXAI applies it row by row.
Try It
Get the 7-day free trial of SheetXAI and open any workbook with emails and new field values, then ask it to update the custom fields in Constant Contact. The Constant Contact integration is included in every SheetXAI plan. For related workflows, see how to bulk tag contacts in Constant Contact from Excel or the Constant Contact in Excel overview.