I was looking for an answer myself.
As others have said, OneDrive does not currently provide a means to synch shared folders into the application.
However, this feature is being developed as we speak, and should be available in the near future.
Check here for more, and feel free to vote while you're at it.
1/9/15 Update Quick update on timing as we know you all care about
this. We’re planning on making Shared Folder sync available by this
summer. We’ll update this thread as we get closer to the date. Thanks
for your patience!
UPDATE:
This is now possible through the "Add to my OneDrive" option in the browser:
Hi all -
I’m excited to let you know that we’ve begun rolling out Shared Folder
sync on OneDrive. We can’t wait for you to start using it!
How does it work? We have a new action on OneDrive, called “Add to my
OneDrive.” Whenever you are using OneDrive on the web, or through the
mobile app, you’ll see this when you are browsing content that others
have shared with you. Clicking “Add to my OneDrive” will add that
folder to your OneDrive. From then on, whenever you browse your
OneDrive, you’ll be able to see any of the shared folders you’ve
added. And on the sync client, when you select what folders to sync,
you’ll see all the shared folders you’ve added. Select the shared
folder(s) you want and they’ll immediately begin syncing to your PC or
Mac.
We’re rolling this out which takes some time, and of course you may
get it before your friend who also wants it (try not to rub it in).
Shared Folder sync is available on Windows 10, Windows 8, Windows 7,
Windows Vista and MacOS. Windows 8.1 users will need to upgrade to
Windows 10 to get this feature. Note that you’ll only be able to sync
shared folders where you have Editor permissions.
Let us know how Shared Folders work for you – and go sync those files!
Do you have the OneDrive for Business App installed as well?
OneDrive and OneDrive for Business are different in every way. ODFB is based on Sharepoint. Your oneDrive for Business account will not log into the OD app or webmail, and the opposite is of course also true.
Just to clarify, this project is not for work, and they plan to use oneDrive, not ODFB, correct? In that case, you won't be able to use O365 login, and you also cannot be logged into more than one onedrive account on either app.
Best Answer
This is possible in classic view version of one drive.