e-Rec. BAdi implementation

Hi Experts,

For the object sync between Persons, Org. units to Candidates and Business Partner I'm trying to activate Badi implementation CHECK_INTER_NA_EXIST of Badi HRALX_HRALXSYNC_BADI. Since it's a std. Badi implementation I can't activate it without an Access Key. Should this object be registered?

It's also not possible to create a new implementation, as SAP has reserved this BAdi for it's own use.

Thanks in advance,

Sachin.