Hi,
>>My requirement to file play automatically once user opened that email.
I'm afraid it's not supported in Outlook. This is because in Outlook 2007 and later version, Outlook uses Word or a Word based editor to edit and display the emails. If you want to play GIF in emails, you need additional steps:
1. Open the email message in separate window.
2. Under Message tab, click Actions > View in Browser.
Regards,
Steve Fan
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