Exchange 2010 Litigation Hold mailbox: Can deleted / modified NOTES be reverted to an earlier revision if a mailbox has Litigation hold enabled?

Litigation hold enables you retrieve any email which is deleted by the user. Exchange stores the emails deleted by user in hidden mailbox folders.
If the notes are corrupted you probably can run mailbox repair or go back to backups
http://technet.microsoft.com/en-us/library/ff625221(v=exchg.141).aspx

Thanks for the answer. This particular mailbox is over 50gb in a very large store without brick level backups, so we're trying to avoid going to backup, since the restore to the restore storage group will be close to 1tb.

I read that the notes are kept in a folder called deleted items /versions, and was hoping someone had used this to pull notes out.

Note :you can only access these folders through MFCMapi program, not Outlook

I was able to recover NOTES using MFCMAPI for the account that had litigation hold enabled.  ALL ITEMS that had ever been deleted since Litigation hold was enabled was able to been seen and recovered.