?thresholdDate=<YYYY-MM-DD>
Take samples modified after this date instead of the default (last 3 months for sampling).
This can be useful if you want to sample either older data, or only more recent data.
Do not confuse with the threshold date chosen when adding transactions (which is the starting point for actual synchronization).
?keep=1
If new fields are discovered in sampling, map them to the "Do not import" category.
This can be useful if a data source has many custom fields and many new ones are routinely discovered.
Additional advanced options, such as the ability to rename fields, can be found
here.