Answer in brief
Every ad channel you use has to be connected to the new MMP separately. For each one you grant account access, map your in-app events, turn on postbacks, restore cost data and rebuild any audiences. Do one channel at a time, disconnect the old MMP from that channel in the same sitting, and watch the numbers for a few days before you move to the next.
What a channel connection contains
A connection between an MMP and an ad channel has five parts. None of them carries over from the old MMP, and missing any one leaves a gap that is easy to overlook.
| Part | What it does | If you miss it |
|---|---|---|
| Account link | Lets the MMP and the ad account recognise each other for your app. | No installs are attributed to the channel. |
| Event mapping | Translates your event names into the events the ad platform expects. | Campaigns that optimise for a purchase or trial stop receiving it. |
| Postbacks | Send attributed installs and events back to the platform. | The platform's own reporting and bidding go blind. |
| Cost data | Pulls spend into the MMP so it can show cost per install and return. | Reports show installs with no cost next to them. |
| Audiences | Sends user lists for retargeting or exclusion. | Retargeting lists stop refreshing. |
Some large platforms attribute their own traffic and report it to the MMP through an account-level integration. They are known as self-attributing networks, and for them the account link matters more than the tracking link.
Before cutover day
- List every channel, the ad account ID for each, and who on your team has admin rights there. Missing permissions are a common cause of delay.
- Write down which in-app events each channel receives today and what they are called on the platform side.
- Confirm that the new MMP plan supports each channel. Ad channel integrations differ by plan. Airbridge Core, for one, covers Meta Ads, Google Ads, Apple Ads and TikTok, and other networks need its Growth Plan.[1]
- Note the attribution windows the old MMP used per channel, so you can set the same ones.
The order to follow for each channel
- Connect the new MMP to the ad account and select your app.
- Map events and switch on postbacks for installs and for the events your campaigns optimise toward.
- Remove the old MMP's connection for that channel.
- Replace the links in that channel's live ads, using the sheet from moving your tracking links.
- Enable cost data and rebuild audiences.
- Send a test install and confirm it appears in the MMP and in the ad platform.
Start with your smallest channel. A mistake there costs little, and you will repeat the same steps with more confidence on the channel that carries most of your budget.
What to watch in the first week
Compare three numbers per channel each day: installs in the new MMP, installs the ad platform reports, and the event your campaigns optimise for. The first two will not match exactly, and the reasons are covered under discrepancy. What you are looking for is a sudden change from the pattern you saw before the switch.
Campaigns that bid on a conversion event may perform unevenly while the platform adjusts to the new source of that event. Avoid making budget or creative changes in the same week, so that you can tell the two effects apart.
What to do next
When every channel has run cleanly for a week, the cutover is done. Remove the old SDK in your next release and close out the old account as described in the migration timeline.
Questions and answers
Do I need to pause my ads while I reconnect an ad channel?
Not usually. Campaigns can keep running while you change the measurement connection. The ad platform's reported conversions can change while it starts receiving them from the new MMP, so watch them daily.
Can two MMPs be connected to one ad channel at once?
It is best avoided. If both send the same conversions, the platform may count them twice. Check that platform's own documentation for how it handles more than one measurement partner, and keep the overlap as short as you can.
Continue reading
Guide
A realistic MMP migration timelineA realistic MMP migration timeline for a small app team: five phases from audit to cutover, what sets the pace and where the schedule usually slips.
Guide
Running the old and new SDK side by sideHow to run your old and new MMP SDK side by side during a migration: what to ship, what to compare, how to avoid double counting and when to stop.
Guide
Moving live tracking links and deep links to a new MMPHow to move live tracking links and deep links to a new MMP: build an inventory, recreate each link, decide what to do with links you cannot edit.
Guide
What happens to historical data when you switch MMPsHistorical attribution data stays with your old MMP when you switch. What to export before the account closes, what cannot move and how to keep trends readable.
Guide
When switching MMPs is not worth itSwitching MMPs costs engineering time, a break in your data and weeks of double running. Six situations where staying with your current MMP is the better choice.
Alternatives
Best MMP alternative to AppsFlyer and AdjustWhat to check in an AppsFlyer or Adjust plan, four alternatives with public entry prices, and a short checklist for switching MMPs.
Sources
- Airbridge: https://www.airbridge.io/en/pricing Checked 2026-11-10.
Cite this page
Airbridge. “Reconnecting ad channels after a switch.” bestmmpalternative.com. Reviewed 2026-11-10. https://bestmmpalternative.com/reconnecting-ad-channels