[Word.BorderCollection] can not set some property to None or Width (outsideBorderWidth, insideBorderWidth, outsideBorderType, insideBorderType)

[jasonhieu1905]

Provide required information needed to triage your issue

Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: PC
• Host [Excel, Word, PowerPoint, etc.]: Word
• Office version number: Current Channel 2412 (Build 18324.20044)
• Operating System: Windows

Expected behavior

You should be able to set all possible values for Word.BorderCollection.

Current behavior

An exception is thrown: InvalidArgument.

Steps to reproduce

1. Create a table style.
2. Access the borders of the table style and set a property to Mixed or None
   targetBorders.outsideBorderWidth = 'Mixed';
3. An "InvalidArgument" error is thrown in the console.

Link to live example(s)

Script Lab:
scriptlab.txt

Context

• We have an add-in to update modified styles in the selected document. Currently, we use the RetrieveStylesFromBase64 API to get all styles and then apply updates to the current document. However, borders cannot be set to None or Mixed for certain properties.

Useful logs

• User can have Mixed value in table border properties
  

[RuizhiSunMS]

Thx @jasonhieu1905, for reaching out here. I can repro it. Mark it as #9644520 into our backlog. I will involve our experts asap. Will reply here if any update.
Btw, would you please confirm that, only "none" and "mixed" don't work while those "ptXXX"s work as expected?

[jasonhieu1905]

Yes, "ptXXX" seems to be working.