How can multiple portfolios be synchronized without scheduling as separate jobs or clicking on each portfolio individually?
The Portfolio list > Action > Synchronize Portfolio Content does not process all the selected portfolios.
By selecting multiple portfolios, all should be synchronized shown by configuring the Last Sync Date.
When setting up the job as as an Action link, it only allows one portfolio to be selected, therefore it will only process what is entered at the time of the creation.
Only a selected portfolio will be processed, therefore it is not possible to process multiple portfolios from the portfolio list.
Release : 15.6+
The checkmarks apply only for the buttons (Save, Delete). It is not designated for multiple selections for synchronizing portfolios.