When the data is coming in via autosynch, duplicate records of the same type (so, 2 bob@asdf.com lead records) will be merged into 1 record, with the field value being decided by whichever has the higher ASCIIbetical value. So for example:
1) bob@asdf.com, BOB, Bobson
2) bob@asdf.com, Bob, BOBSON
The final value in Eloqua will be:
bob@asdf.com, BOB, BOBSON
The sort order is A -> Z, a -> z, 0 -> 9
If the records are of different types, and thus coming through on different autosynchs, the "winning" value will be decided based on whichever autosynch has the higher data priority order, or if theyre both equal priority, whichever ran more recently.
When the data is leaving Eloqua, it will be determined based on the rules in your CRM Update program. So if you check for Lead ID's first and update the record if it has a value, you will be updating the lead records. If you check for contact ID first, then the contact will be updated. You have a lot more control of the data leaving Eloqua due to the fact you can build all sorts of routing into your CRM update program.
If youre using integration rules for your external integration, it will just fire everything off and all records will be updated. This is not the recommended approach though and not many people use integration rules.
