I'm helping my wife upgrade to Now X and at the same time, coach her as to the best workflow to use after the upgrade.

Presently, she has many same entries in both Now 5.X and Address Book. However, she maintains email addresses using Address Book and not her Now 5.x app.

Upon upgrading to Now X and synching up her two databases, will duplicates (Address Book and Now 5.x) be identifiable and or will they be merged? How will this occur? Upon sync or after the fact?

As is always the case with any kind of data merge, there will be duplicates that did not get identified as such (data entry errors, etc). Is there a Merge Records capability in Now X?