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Developing an office 365, outlook add-in. Changed the add-in icon (Basically just replaced the old icons with new one. Icons have the same name.). Icon comes up fine on OWA but on Outlook 2016 add-in still, shows the old icon.

Troubleshooting steps till now :

  • Uninstall reinstall add-in => no effect.
  • Uninstall add-in, restart Outlook 2016, reinstall add-in => no effect.
  • Reset customizations from 'Customize Ribbon' option inside 'Outlook Options' => no effect.
  • Restarted server => no effect

validate-office-addin shows 'manifest.xml' as valid.

Alfred DSouza
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2 Answers2

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You need to delete the local cache. Delete the contents of %LOCALAPPDATA%\Microsoft\Office\16.0\Wef\

Rick Kirkham
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  • Thanks, @Rick. Well, I resolved it by simply renaming the files and updating the manifest files accordingly. – Alfred DSouza Jul 27 '17 at 10:27
  • @RickKirkham Once I was desperate to find this information when changed the icons of the app. To be honest end up remaining the icons, well ... shortcuts ;) Thanks for tip. – Slava Ivanov Jul 27 '17 at 13:31
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I resolved it by simply renaming the icon files and updating the manifest files accordingly.

Alfred DSouza
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