shared mailbox folder is empty

[lijinlongpq]

Today (23/4/2015) i updated my ews-java-api, the previous one i downloaded is on 3/3/2015. I found that the new one a lot of classes seperated into different packages under microsoft.exchange.webservices.data.
My problem is that i cannot access to a shared mailbox by using the new api. But the previous one is working fine. Below is my code:

Mailbox mailbox = new Mailbox("support@mycompany.com");
System.out.println("Mailbox IsValid: " + mailbox.isValid());
FolderId InboxFolderId = new FolderId(WellKnownFolderName.Inbox, mailbox);
System.out.println("IsValid: " + InboxFolderId.isValid());
System.out.println("Inbox Folder: " + InboxFolderId);

The output is:

Mailbox IsValid: true
IsValid: false

Inbox Folder:
The mailbox is valid, but the Inbox folder ID is empty.

[amulyayadavilli]

I am assigning a folder id to the folderId created.

final FolderId userFolderId = new FolderId(folderName, userMailBox);
userFolderId.setUniqueId(UUID.randomUUID().toString());