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Adjoining Form Region in Outlook does not display title if the display language is set to languages like Arabic, Hebrew etc. (Right to Left languages). I want to know if I am doing something wrong.

AG 0 Reputation points
2025-03-06T13:33:06.7333333+00:00

I developed a COM Add-in that uses Form Region to display some text related to the context of the email.
I created an adjoining form region.
For the languages, whose flow direction is Left-To-Right, the title of the Form Region is displayed correctly.

When I set the display language of Outlook to Arabic / Hebrew, the <stringOverride> settings of the form region from the Manifest XML are not obeyed.
I don't see any title on the adjoining form region in this case.
The Flow direction of the Form Region/UI elements has changed to Right-To-Left though.

I am not sure if I am doing something wrong or if it is a bug / known issue in Outlook.
I noticed this is Outlook 2019 and Outlook O365. Did not get to check with other versions of Outlook.

I attached the screenshots of what this is.

For English as the display language, this is how it looks.User's image

When I change the display language to Arabic,

User's image

I checked with a VSTO Add-in too.
The behaviour is the same.
The code is almost nothing. Just created the project from template and then added the Form Region using New Item.

Any help on this is much appreciated.
Thanks a lot, in advance.

Outlook Management
Outlook Management
Outlook: A family of Microsoft email and calendar products.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Hien-L 1,060 Reputation points Microsoft External Staff
    2025-04-18T09:37:35.43+00:00

    Hi AG,

    Welcome to our forum!

    It seems your case is more related to Outlook add-in development, please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. It's suggested that you could post your case in dedicated tag for development for more professional advice: Office Development.

    In addition, you may refer to the article Specify Locale-Specific User Interface for a Form Region | Microsoft Learn and have a try.

    Thanks for your support and understanding.

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".  

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