Add Custom Document Properties via Plugin

How can I add a custom property (like “Modified Date”) to a document using an ONLYOFFICE plugin?
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Hello @subbu

Please provide more details about the usage scenario and about custom properties in general. What is the screenshot referencing?

Hello @Constantine

There are multiple use cases. One of the use case is to embed compliance-related metadata such as RegulationCode, ApprovalStatus, or ReviewerName.

Another use case would be include fiscal year, report type, and auditor details in financial documents.

manual entry is error-prone and inefficient. Hence we are looking for a solution to update the custom document properties programmatically.