Microsoft Advertising’s AI Max Is Expanding Search Automation—While Max CPC Control Narrows

Expanded search-term matching

AI Max can expand reach beyond an advertiser’s existing keywords and match ads to additional relevant search queries. Microsoft’s documentation describes this as AI-powered search-term matching, while its broader AI Max announcement frames the feature as a way to uncover new demand through improved query matching.

This should not be confused with a new standard keyword match type. Microsoft’s documentation separately describes predictive matching as an optional Search feature that uses the final URL, ad titles, ad text, and existing keywords to find new queries for eligible conversion-based automated bidding strategies.

AI-generated and personalized ad text

AI Max is intended to generate new text assets and personalize creative in real time. Microsoft says AI Max can use information from the advertiser’s landing page to help generate relevant assets, and that AI-optimized assets are labeled and editable.

Microsoft’s wider advertising documentation also describes text guidelines that let advertisers control words and phrases used in AI-generated assets. Those controls are important for brands with legal, regulatory, or positioning requirements, although advertisers should review the exact settings available in their account before activation.

Dynamic final-URL expansion

The feature also uses landing-page information to match an ad with a potentially more relevant page on the advertiser’s site. Microsoft describes AI Max as matching ads to the most relevant landing pages, with URL exclusions available to limit where traffic can be sent.

That makes final-URL expansion a potentially useful reach and relevance mechanism, but it also means advertisers should check site structure, conversion tracking, excluded pages, and commercial or compliance-sensitive URLs before enabling it.

Bing and Copilot coverage

Microsoft positions AI Max for AI-driven search experiences such as Copilot Search and Copilot Answers. Microsoft’s Copilot advertising documentation says ads are automatically created from existing campaign assets, including text and images, so Copilot coverage does not necessarily mean that every ad is generated from scratch for every conversational query.

The practical implication is that advertisers need to treat their existing assets, landing pages, exclusions, and conversion signals as inputs to a wider AI-mediated search environment—not just as settings for conventional keyword auctions.

Controls, exclusions, and reporting

Microsoft’s public material emphasizes visibility and control alongside automation. AI Max-related capabilities include campaign-level enablement, exclusions, asset and keyword reporting, and experimentation tools intended to help advertisers evaluate performance lift.

Microsoft’s API documentation also exposes separate opt-out settings for AI-generated text, final-URL expansion, and search-term matching. These controls indicate that the feature is designed to be configurable, although availability and interface details may vary during a pilot or staged rollout.

One claim that remains unverified in the supplied evidence is automatic activation for every campaign already using autogenerated text assets or Predictive Matching. The available official material confirms those capabilities exist, but it does not establish that all such campaigns were automatically opted into AI Max. Predictive matching itself remains an optional Search feature for eligible conversion-based automated bidding strategies.

What is actually known about the rollout timeline?

The timeline is contradictory rather than settled:

• Microsoft announced AI Max for Search in an April 2026 post and said it would be available in an open pilot in May.
• A June 2026 Microsoft Advertising event recap described AI Max as a closed pilot.
• The supplied sources do not verify a global August 2026 rollout or establish that the feature was broadly available to every advertiser by then.

Advertisers should therefore confirm eligibility and account-level availability instead of assuming that an August announcement or product reference means universal access.

Microsoft’s October 1 Max CPC change

Beginning October 1, 2026, Max CPC will no longer be available when creating new non-portfolio campaigns using:

• Maximize Clicks
• Maximize Conversions
• Maximize Conversion Value
• Target CPA
• Target ROAS

The change applies to new campaigns. Existing campaigns created before October 1 that already have Max CPC settings can retain them, according to the reporting on Microsoft’s notification.

Which bid-ceiling alternatives remain?

The supplied reporting identifies several remaining routes:

• Portfolio bid strategies: Max CPC remains available in portfolio setups.
• Other supported bidding strategies: Target Impression Share and enhanced CPC are identified as strategies that retain Max CPC availability in the cited coverage.
• Existing eligible campaigns: Campaigns created before the cutoff can keep their current Max CPC settings.

This is not a universal removal of every CPC control. It is a restriction on adding Max CPC to new standalone or non-portfolio campaigns using the affected automated strategies.

How this compares with Google’s budget-limited tCPA and tROAS change

The supplied sources document a Google policy change beginning August 17, 2026. They report that budget-limited campaigns using target-based bidding would be steered closer to the stated Target CPA or Target ROAS value, rather than continuing to operate at a materially more efficient result below the CPA target or above the ROAS target.

That is a different type of change from Microsoft’s Max CPC decision:

• Google’s change concerns how a target is treated when a campaign is limited by budget.
• Microsoft’s change removes a Max CPC setting from new non-portfolio campaigns using specified automated strategies.

The supplied sources do not provide a definitive Microsoft policy statement establishing a directly equivalent tCPA or tROAS budget-limited behavior. It would therefore be inaccurate to present the two platforms as having formally identical or opposite policies. The safer conclusion is that Google’s documented change concerns target enforcement, while Microsoft’s confirmed October change concerns access to a per-click cap.

Why practitioners are criticizing the Max CPC decision

The criticism is about control and workflow, not simply whether portfolio bidding still exists. A Max CPC limit gives advertisers a direct per-click exposure guardrail at the campaign level. Removing it from new standalone automated campaigns can force advertisers to reorganize campaigns into portfolios or adopt other bidding configurations to preserve similar control.

Practitioners therefore point to three practical concerns:

1. Less granular control: A portfolio structure may not fit every campaign or segmentation model.
2. More operational complexity: Advertisers may need to redesign account architecture rather than simply set a CPC ceiling during campaign creation.
3. Risk for constrained advertisers: Smaller accounts, tightly segmented campaigns, regulated brands, and businesses with strict unit economics may prefer a hard CPC limit even when using automated conversion bidding.

Microsoft’s stated direction is toward letting automated bidding manage performance with budgets and conversion-value targets rather than a CPC cap. The trade-off is clearer: potentially simpler automation for some advertisers, but fewer direct controls for campaigns where a click-level ceiling is part of the risk model.

What advertisers should verify before making changes

Before enabling AI Max or creating campaigns ahead of the October deadline, advertisers should check:

• Whether AI Max is actually available in the account, rather than relying on the announced timeline.
• Which search-term matching, autogenerated text, and final-URL expansion settings are enabled.
• Whether URL exclusions and brand or content guardrails are configured appropriately.
• How AI-generated assets are labeled, edited, and reported.
• Whether existing campaigns with Max CPC caps should be preserved or migrated.
• Whether a portfolio structure is operationally and financially appropriate for the account.
• Whether conversion tracking and landing-page routing are reliable enough for broader automation.

The overall direction is clear even where the rollout details are not: Microsoft is expanding AI-assisted reach and creative flexibility in Search while narrowing the role of campaign-level CPC caps in new automated campaigns.