Mass update agreement no on PO line

Summary:

Our customer has requested the ability to perform a mass update of the Agreement (CPA#) field on Purchase Order lines. We are seeking information on any available web service, REST API, or spreadsheet solution that can facilitate this task.

Could you please advise if such a tool or functionality exists, or recommend an approach to efficiently perform these updates?

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25C

Code Snippet (add any code snippets that support your topic, if applicable):