What is the best way to export device tokens and relevant device details of Mobile App subscribers from Legacy system to ACS for history migration purpose?

Hey,

I'd say via the SDKs would be the easiest/cleanest (& potentially best).

But if you can't, I have managed to do it at some point from a file import to ACS with tokens, Name of the App & Platform (ios, android) + any other data required (if you extended the appsubrcp resource).

In terms of loading the data, its kind of a 2 step process:

1. Load data to the AppSubRCP, need to do a enrichment of data linking the incoming data to existing Apps (using the value in your file & @2175539 in Mobile Applications, that way you can update the mobileApp link). I also loaded the first 10 Characters of the token to the marketingcloudID field.

2.At the same time, load the same data to the PushNotificationStatus resource (just token & marketing cloudID). Similar to point 1, I loaded the first 10 Characters of the token to the marketingcloudID field.

Point 2 seems to be needed, otherwise you cant' actually view or see the appsubrcp data.

Cheers,

Don