By default Easy2Sync for Outlook synchronizes the entire PST file/ the entire Exchange account (either the private or public part). You can limit this to a folder.
Limiting the sync to one / multiple folder (when creating the task):
Simply choose the desired folder in both data storages.
Limiting the sync to one folder (later):
Double-click the task > Data storages > Choose data storage > Data storage 1 > Extended
Choose the desired folder and repeat for data storage 2.
Limiting the sync to multiple folders (later):
Double-click the task > Exceptions > Folders
Choose the desired folders.
Limit the sync to one type, e. g. only contact folders or only e-mail (only later):
Double-click the task > Exceptions > Type
Choose the desired types. This is useful if you have multiple contact folders or only want to sync e-mail folders.