User match when having multiple aliases

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If we set id “A” as a user app id in RC and set id “B” as a user alias for the same user, is RC will be able to match a user with the id “B” knowing that it is not the user app id?

To give you more context, we need id “A” to be set as a user app id as we need this id to be sent to Amplitude. But we also need id “B” to be set for the user as we need to it to match user between different platforms (iOS and MacOS).

Could you confirm that it is the order that determine which id is set as the app user id?

According to this question, it is the case so it means we should first set id B then id A then.


Hope my question is clear,


Thank you,



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