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Microsoft Advertising introduces API versioning for new response fields and objects

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garittar
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Nov 09, 2026

Microsoft Advertising is introducing API versioning for new response fields and objects in the Campaign Management API. 

With API versioning, the API returns additions based on the Api-Revision date included in the request. You no longer need to select versioned additions through AdditionalFields. 

Existing AdditionalFields behavior remains unchanged unless the API documentation identifies a field or object as versioned. 

For Microsoft Advertising SDK users 

No action is required. Supported Microsoft Advertising SDKs automatically send the appropriate Api-Revision header with each request. 

Upgrade to the latest supported SDK to access the newest versioned fields and objects. 

For custom-client users 

Include the following HTTP header with every REST or SOAP request: 

Api-Revision: YYYY-MM-DD 

Use a revision date published in the Microsoft Advertising API documentation. 

Important considerations for generated proxies 

Before using a later Api-Revision date, rebuild and test your proxy. An older proxy might not be able to deserialize fields or objects introduced after it was generated. 

Don't use an arbitrary revision date. Use the revision date published in the API documentation. 

Learn more 

See the Microsoft Advertising API documentation for supported revision dates and information about versioned fields and objects. 

Published Nov 09, 2026
Version 1.0
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