I'm hoping someone might be able to clarify a couple of questions on New-MailboxExportRequest:
1. How many export request can be in progress at the same time, by default? For example, if an administrator creates export requests for 1000 mailboxes, how many will be queued versus in progress?
2. A 10 GB mailbox is exported. One week later, another export request is generated for the same mailbox, which has gained an additional 50 MB of data. The export is pointed to the same PST used for the original 10 GB. Will the second export complete in a more timely fashion since most of the content will not have changed from the original 10 GB export?