Guidance on Programmatically Updating Email Signatures in Outlook Using the Outlook REST API

Louis Cronje 25 Reputation points
2024-03-18T10:01:45.34+00:00

I'm looking to programmatically update email signatures in Outlook for our team. How can I achieve this using the Outlook REST API? I need guidance on authentication, accessing email signature settings, and updating them with HTML content, including a selected banner image. Additionally, what permissions or access rights do I need, and where can I find documentation or resources to implement this?

Outlook Windows Classic Outlook for Windows For business
Microsoft Security Microsoft Graph
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  1. ChristyZhang-MSFT 26,121 Reputation points Microsoft External Staff
    2024-03-19T02:10:37.08+00:00

    Hi @Louis Cronje ,

    Welcome to our forum!

    Based on my research, i found a thread mentioned that Currently with Microsoft Graph API, doesn't have support for Signature.:

    User's image

    Please kindly understand that many functions are not designed at present. To get this feature more quickly, I have found a post in feedback collection website and you could vote for it. Many features of our current products are designed and upgraded based on customers’ feedback. You can also make suggestions on that website and hope Microsoft will notice this in the future. Thank you for your understanding and support.


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