The move object info message is too large. Current size 17,592,186,042,368 MB limit 480 MB

THAT message. Yes THAT message. I received this for a bunch of mailboxes I was moving From Exchange 2010 to Exchange 2016. The complete error is confounding and does not make much sense:
So what is the solution? The error’s solution is rather simple. There is an existing move request for the mailbox being moved. The solution is to remove any move requests. However, if the move request exists in Exchange 2010 and we try to remove this request from Exchange 2016’s PowerShell interface we get this error:
Yes, that is a very similar message. To resolve the issue, simply remove the request from an Exchange 2010 server, which runs much better:

That’s it. Relatively simple fix. So if you see the error, remember to remove the move request from the old server first to see if that resolves your issue.