Please follow the below instructions to locate the iPad identifier [UDID]
- When iPad is connected to your computer, Open iTunes.
- Then, select the iPad when it appears in the left column.
- After that, click on the Summary tab.
- Next, Click on the Serial Number and the Identifier (UDID) will appear.
- Please refer the link "http://support.apple.com/kb/HT4061" to locate the iPad identifier (UDID).