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I need to set a short note or info on mail item programmatically. As shown below for instance. enter image description here

I tried with setting a custom mail item category but it doesn't appear on mail item when it is opened. I can only see it in preview. Setting something like label or tag also works for me. How do I achieve this?

Thanks in Advance.

Nikki
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That area is not accessible for customization and it does not show any particular property of the selected message,

Dmitry Streblechenko
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  • Any other way to set a short note on mail item, so that when user opens the mail item he knows something is processed by add-in. Not necessarily in that area. – Nikki Oct 16 '20 at 16:28
  • You can add a category. – Dmitry Streblechenko Oct 16 '20 at 16:41
  • I want to add the category programmatically, when the mail is in compose mode by user. In the add-in code, I add category and save the mail item, category is not visible on the mail item that's is open and in compose mode. Although I can see category on mail item(in drafts folder) in preview. – Nikki Oct 19 '20 at 11:27
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    Yes, category is only visible for the received messages, not draft. You can also try to create a form region, where you can display anything you want. – Dmitry Streblechenko Oct 19 '20 at 18:41