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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / What is the best way t...
Small and medium business | Business Central, N...
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What is the best way to store secrets in Business Central?

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Posted on by Fatou Kiné 2
We want to store an azure client secret to be used in a code unit to generate JWT tokens for sending HTTP requests.
 
We have explored the key vault option but we are using business central online with a Per-Tenant Extension which does not seam to support key vault integration (https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/administration/setup-app-key-vault).
 
Which other secure options do we have to achieve this?
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Dynamics 365 Business Central
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  • Suggested answer
    Aman Kakkar Profile Picture
    Aman Kakkar 1,714 on at
    What is the best way to store secrets in Business Central?
    Hi,
     
    One option that works well in PTEs is using the SecretText data type. I've used this approach before to store and use client secrets securely inside AL code.
     
     

    Create a setup field and set ExtendedDatatype = Masked. This ensures the user can enter the value, but cannot read it afterward.

    field(7; "Client Secret"; Text[2048])
{
    Caption = 'Client Secret';
    ExtendedDatatype = Masked;
    ToolTip = 'Azure AD Client Secret.';
}
     
    Inside your codeunit (e.g., when generating JWT or OAuth tokens), convert the stored value into SecretText:
     
    procedure GetSecretKey()
var
    SecretKey: SecretText;
begin
    SecretKey := SecretText.SecretStrSubstNo(Setup."Secret Key");
end;
     

    The advantage of SecretText is:

    • It cannot be directly converted back to plain text
    • It avoids exposure in debugging, errors, and telemetry
     
    Do mark as verified if this helps.
    Aman K

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