Microsoft Advertising September 2026 updates: HubSpot integration and LinkedIn company lists

The HubSpot integration is the part I would spend time on first. Less manual reporting is useful, but seeing which Microsoft Advertising campaigns produce qualified leads and revenue could change where the budget goes. A campaign with a higher cost per lead may deserve more spend if those leads progress further. I want that distinction visible before a cheap lead campaign gets another budget increase.

I would not take a cleaner revenue report as proof of incremental growth, though. Connecting clicks to deals improves visibility, but it does not establish that every attributed deal happened because of the ad. My first move would be to reconcile a sample of contacts and deals against existing CRM reporting, check attribution settings and allow for conversion lag. If qualified CPL and eventual CPA still look good once the leads mature, that would give me a stronger reason to test more budget.

The bigger LinkedIn company lists offer useful breathing room for B2B targeting. But 10,000 company names is a list capacity, not a promise of more useful impressions. With a constrained budget, I would keep priority accounts distinguishable from the expanded list rather than assume every additional company deserves the same spend. More reach earns its place when the extra leads survive qualification, not simply when the platform finds somewhere else to serve ads.

There is a limit to what we can conclude here. The supplied snapshot announces optimization experiments and a REST API deadline without the detail needed to act confidently. I would verify integration eligibility, get the experiment documentation and identify any affected API dependencies. There is enough here to start checking, not enough to promise better performance or plan a migration from the headline alone.