Share via

Where are signatures stored for "New Outlook"

Sean Swanson 0 Reputation points
2024-12-09T19:08:36.6566667+00:00

I have been writing a PowerShell script that autogenerates user signatures. It currently uses Microsoft Graph and a registered App to pull user information from AzureAD to create 2 .htm files for New and Reply/Forward.

99.9% of our users are using Outlook Classic so these files are saved to the traditional place:

C:\Users\<USER>\AppData\Roaming\Microsoft\Signatures

Registry Keys are created to force them to be set as their default template:

HKCU:\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676

After hearing how Microsoft is going to eventually start forcing New Outlook on all of us, I am trying to find official documentation on where signature files are located?

After some testing, it must be somewhere in the cloud. I started making signatures in New Outlook and OWA. I am not finding anything related to signatures in my OneDrive.

As soon as I open Outlook Classic - they get pulled almost automatically to the AppData folder assuming you have the cloud roaming feature enabled (default setting).

TLDR: Where are Outlook New signature files stored? As soon as I can figure that out I can manage uploading my own templates to users organization wide with Graph.

Microsoft 365
Microsoft 365
Formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line.
5,537 questions
Outlook
Outlook
A family of Microsoft email and calendar products.
4,344 questions
Microsoft Graph
Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
12,842 questions
PowerShell
PowerShell
A family of Microsoft task automation and configuration management frameworks consisting of a command-line shell and associated scripting language.
2,753 questions

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Joan Hua-MSFT 3,885 Reputation points Microsoft Vendor
    2024-12-10T02:02:32.73+00:00

    Hi @Sean Swanson

    Welcome to our forum!

    Email signatures in the New Outlook and Outlook on the Web (OWA) are stored in the cloud and synchronized across devices, but they are not accessible through the Graph API directly at this time. This means you cannot create, modify, or retrieve email signatures using the Graph API.

    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. 

    User's image

    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".  

    Note: Please follow the steps in our [documentation] to enable e-mail notifications if you want to receive the related email notification for this thread. 

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.