A default icon is displayed instead of the ones specified in the manifest

Your Environment

• Platform : PC Server (Windows 2022 Server)
• Host : Excel
• Office version number: Version 2510 Build 19328.20266 Monthly Channel
• Operating System: Windows Server 2022 Datacenter 21H2 OsBuild 20348.4052
• Browser (if using Office on the web): N/A

Expected behavior

Icons specified in the manifest should be displayed in the Excel ribbon

Current behavior

A default ribbon icon is displayed like in :

Steps to reproduce

1. Just deploy the addin an open in the specified environment (works well with windows 11 desktop)

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Link to live example(s)

1. <b:Image id="createSwap16x16" DefaultValue="https://app-office-addin.analytics.lseg.com/public/lseg-financial-office-add-in/9.0.70/icons/excel-create-swap-16.png"/> for ex is publicly available

Provide additional details

1. Addin centrally deployed, Excel running on AWS VDI
2. Not replicated on Windows 11 desktop machine

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Context

We dont see the expected ribbon buttons icons

Useful logs

• Office runtime log :

OfficeAddins.log.txt