To view all the services being shared with you simply:
1. Click Services from the top navigation bar.
2. Select Shared With Me from the drop down.
3. From here you can filter by Service type.
4. You can also search for the name of the Service being shared.
5. The list of Services will appear here, if none appear on here it would mean that the service has been added directly on the account and can be found under Services > My Services.
Services from Shared With Me view are "Read Only" only the owners of the service have edit rights.