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john s.john s. 

Dataintegration Contacts from SF to SF which External Field ?

SF.-Professional 
Standard-Sandbox
Hello

I want to migrate some Contacts from my SF-Prod to my SF-Sandbox.

so which external id i should take .. i tried this with the ID itself but there comes an error with " invalid crosse reference id"

is use talend .. but this should doesn't really matter in this case 

regards john 



 
john s.john s.
Or do i overlook sth. ? which is important in this case ? 

regards john