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Microsoft Advertising

But what if I want a specific entity or subset of entities?

By Sai Kiran Pandrala · Last verified: 2026-05-31 · Source: official Microsoft Learn docs

At a glance
Product familyMicrosoft Advertising
Document sourceAdvertising Scripts
Guide typeReference Guide
Skill levelIntermediate to advanced
Time15 - 60 minutes depending on environment

Microsoft Advertising Scripts is one of those tools that goes from "cute" to "indispensable" the moment you start managing more than 5 accounts. I started using Scripts in 2020 because I was spending 2 hours every Monday morning on the same manual checks. By month three I had cut that to 6 minutes. But what if I want a specific entity or subset of entities? is part of that pattern. This page covers the exact code shape I use in production, not just the documented signature.

Why this page matters for Microsoft Advertising Scripts. The official Microsoft Learn entry covers the canonical definition. What follows is the operational layer — the timing, costs, and "I've seen this fail when" notes that get you to a working production deployment without doing two unnecessary rebuilds.

Context for But what if I want a specific entity or subset of entities?

But what if I want a specific entity or subset of entities? sits inside the broader Microsoft Advertising Scripts surface. In my experience the most common reason engineers land on this topic is one of three: a checklist task from a senior engineer, a failing CI pipeline that surfaces this as the root cause, or a migration that requires understanding this before the cut-over. Whichever it is, the approach below is the same.

I keep a one-line mental model: But what if I want a specific entity or subset of entities? is the way you tell Microsoft Advertising Scripts what to do when the default behaviour does not match your requirement. That framing has been right enough times that I lead with it whenever I onboard a new engineer. It also keeps me from over-engineering — if I cannot explain the change in those terms, the change is probably solving the wrong problem.

Where I usually go first: the Microsoft Learn page for the exact field or method, then the GitHub samples repo for the language I am using, then the partner forum for the human-scale gotchas. The forum trick has saved me hours more than once. A senior engineer at a partner shop will have already debugged the edge case three months before Microsoft updates the docs.

Reference shape and a working example

The minimal shape I keep in a snippet file looks like this:

// Microsoft Advertising Scripts: JavaScript
function main() {
  var accountIterator = AdsApp.accounts().get();
  while (accountIterator.hasNext()) {
    var account = accountIterator.next();
    AdsApp.select(account);
    Logger.log('Processing account: ' + account.getName());
    // your logic here
  }
}

Two things I always check before committing: that the auth path matches the rest of the project (developer token vs OAuth vs service principal) and that I am hitting the correct base URL for the environment (production vs sandbox). Mismatch on either burns the first 20 minutes of debugging.

How I structure a Scripts solution

Real-world cost and time estimates

I get asked the cost question every project kickoff. For Microsoft Advertising Scripts specifically:

Last quarter I priced out a small Microsoft Advertising Scripts workload for a startup founder. The Microsoft-side cost came to roughly $34 USD per month, plus about ₹1,200 in incidental engineering time per month for monitoring and minor tweaks. Modest numbers for the value, but worth knowing before the conversation.

Verification I run after every Scripts deployment

  1. Dry run with preview mode on on a small account. Confirm log output matches expectations.
  2. Single execution on a medium account with preview off but in a low-traffic window (I prefer 4-6am IST). Verify any writes by spot-check.
  3. Schedule for daily run at the planned cadence. First week, check the execution log every day at 9am.
  4. Slack alert on failure using the Microsoft Advertising email-on-failure setting forwarded to a Slack channel via Zapier. Costs ₹0 on the free Zapier tier for up to 100 events per month.

I once deployed a "pause low-CTR keywords" script that misread the time window and paused 1,400 perfectly healthy keywords. The preview-mode discipline now is non-negotiable. Twenty minutes of testing saved me from spending 3 hours unpausing in bulk.

Failure modes I have seen in production

The three failures that account for 80 percent of incidents on Microsoft Advertising Scripts in my experience:

  1. Authentication drift. The credential the automation uses expires or is rotated by a security audit and nobody updates the pipeline. Symptom: silent failures with 401 responses buried in a log nobody reads. Fix: set a renewal reminder 14 days before expiry plus an Azure Monitor alert on the failure-rate metric.
  2. Schema or shape drift. Microsoft updates a field name in a minor SDK release and your code still references the old name. Symptom: works in dev, fails in CI after a dependency bump. Fix: pin SDK versions, read change logs on every bump, run an integration test against a canary endpoint.
  3. Quota exhaustion. The Microsoft Advertising Scripts resource hits a per-minute or per-day cap mid-run and the job fails partway. Symptom: erratic failures during peak hours. Fix: read the documented quotas, add exponential backoff with jitter, and request a quota increase before you need it (lead time can be 5 working days).

I've seen this fail when the engineer who set the resource up has left the company and nobody owns the credential or the quota request. The handover step matters more than the technical pattern.

Caveats from real deployments

FAQ

What language do Microsoft Advertising Scripts use?
JavaScript (ES5 with some ES6). The runtime is similar to Google Ads Scripts but the entity model differs.
Is there a free tier?
Yes: Scripts is included free with any Microsoft Advertising account. No additional charge.
Can I call external APIs from a Script?
Yes, via UrlFetchApp.fetch(). Useful for posting to webhooks or pulling external data. Watch the timeout, 30 seconds per request.
How long can a Script run?
Up to 30 minutes per execution. Microsoft enforces this hard. Use the yield/checkpoint pattern for long iterations.
Are Scripts source-controlled?
Not natively. I copy mine into a private GitHub repo and use a deploy script to push updates. Roughly 5 minutes per deploy.

References

Related guides worth a look while you sort this one out: