> For the complete documentation index, see [llms.txt](https://support.sayprimer.com/primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.sayprimer.com/primer/primer-support-review/destinations/microsoft-ads.md).

# Microsoft Ads

Microsoft Ads is a beta destination available on request.

**Beta — contact** [**support@sayprimer.com**](mailto:support@sayprimer.com) **to request access.**

Microsoft Ads is a beta destination. It won't appear in your destination picker until support enables it for your organization. Once enabled, you connect your Microsoft Ads account and sync a [Ready](/primer/primer-support-review/audiences/audience-statuses.md#ready) audience to it like any other destination.

* **Minimum audience size:** 300 records.

## Accept the Customer List terms in Microsoft

Microsoft requires you to accept its **Customer List terms of service** before it will accept an uploaded list. If a sync fails because those terms haven't been accepted, sign in to Microsoft Advertising, accept the Customer List / Customer Match terms for your account, then rerun the sync from Primer.

## Customer Lists take up to 48 hours to build

After a successful sync, Microsoft takes **up to 48 hours** to build the Customer List and report its matched size. Until then the list shows no size — that's expected, not a failure. Check back after Microsoft finishes building it; see [Finding your synced audience](/primer/primer-support-review/destinations/finding-your-synced-audience.md) for where the list appears.


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