Setting in iMessage to delete a message on one device and have it delete on all apple devices?
How do I delete an iMessage on one device and have it delete automatically across other ios devices?
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So it does seem that you want to be able to erase a message on one device and have it erase on another.
> Please confirm you are logged in with the same Apple ID in iCloud on all devices.
If you are using messages in iCloud then you should be able to do use that feature.
> You can check this in settings > name > iCloud > messages
If messages is toggled on, that means your messages are now being stored in iCloud. If you erase a message it will erase from all devices.
Turn on messages in iCloud : https://support.apple.com/en-us/HT208532
hope this helps ;)