To use the EndNote for iPad app effectively, you will need to create an EndNote Online account. Create or re-activate your EndNote Online account from within EndNote desktop (e.g. in EndNote X7 select Edit, then Preferences, then Sync).
Note that the “sign-up” period for EndNote X6 users for an EndNote Online account with full features has expired.
Second computer synchronisation
If there is a need to synchronise an EndNote Online library with a second desktop (or laptop) computer:
Create a new EndNote library on a second computer
Select the Sync button in EndNote on the second computer and enter your EndNote Online details.
Group sets created in the library on the first computer will synchronise across, although they are not showing in the EndNote Online library.
Tip: This is a method that can be suitably used if you need to work on different computers and access the same EndNote library.