What changed: Microsoft Advertising launched a live HubSpot integration, increased LinkedIn company list capacity from 1,000 to 10,000 names, made optimization experiments generally available for Search, Shopping, Audience, and Performance Max campaigns, and extended the SOAP-to-REST API transition, confirming SOAP will be deprecated on January 31, 2027.
Who is affected
Advertisers and agencies using Microsoft Advertising, particularly those running LinkedIn profile targeting or integrating via the SOAP API; the source does not specify a country scope beyond noting LinkedIn company lists are available globally in supported markets.
What it means for your business
For businesses using Microsoft Advertising, this means they can now build LinkedIn-targeted account lists of up to 10,000 companies instead of 1,000, and must migrate any SOAP API integration to REST before January 31, 2027.
What to do
Migrate SOAP API integrations to REST API before January 31, 2027; expand LinkedIn company targeting lists up to 10,000 names; use optimization experiments to A/B test campaign changes before applying them live.
When it takes effect
SOAP API will be deprecated on January 31, 2027; the HubSpot integration, larger LinkedIn list limit, and optimization experiments are available as of this blog post's publish date.
