After adding CustomAttr attribute to Global Default Settings you are unable to see/export the field form the Notes Person Document. For example:
[Notes]
CustomAttr1=Spouse
CustomAttr2=employeecertnumber
Above values shall be used during merge process
STATUS
Waiting for fix in a future release of Notes Migrator for Exchange.
For additional status updates or information on this please contact your account manager and reference the Change Request # TFS104702.