Our organization has been in arcgis online for 5 years. We have around 40 users of varying permissions. We recently started utilizing portal for arcgis. The main reason we wanted to implement this is so that we could directly edit our enterprise geodatabase data using field maps. One thing I haven't been able to figure out a good workflow for, however, is letting users who are a part of our arcgis online organization access that data in portal. In particular, I have a few water resources layers that I've published to portal that I'd like for our field crews to be able to access in arcgis online/field maps. Is there a convenient way to do this or is the intention to force all those users to have an additional portal account as well?
I'm trying to keep things as simple as possible. Any advice would be appreciated!