Any issues reading in a subscribers file each week from our CMS?

(Title should have read CRM)
Quick question on updating a subscriber list:

We have a spreadsheet which contains a list of all our resellers.
We have already read these into Campaign Monitor however, the file has two custom fields which assigns a member of our business development team to each Reseller.

However this information changes on a month by month basis. Am I able to read this file in each week or will it cause the historical data on these subscribers to be over written?

davidaf davidaf, 5 years ago

Hi Adam, if you reimport a subscriber list with new data in the custom field, the custom field data will update with the new information and override the old data, but the overall subscriber history will be retained. I hope that answers all your questions, if not feel free to write back.

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