How do we deal with arbitration mailboxes to roll back a failed Exchange 2016 install (migration from Exchange 2010)?

We're in the process of migrating from Exchange 2010 to Exchange 2016.  Our Exchange 2016 install on a new virtual server (Server 2016) failed a couple of times, and the VM has started bluescreening, so we're looking to start fresh.

We're trying to uninstall Exchange 2016 before removing the VM and starting over, but are having some issues uninstalling due to Exchange 2016 still having it's default database. We can't remove the database due to existing arbitration mailboxes.

The documentation states these should be moved to another database, or if it's the last server in the organisation (which it isn't as we have our original Exchange 2010 server which hasn't been migrated)  to run -DisableLastArbitrationMailboxAllowed.

Is it safe, or even possible, to move the 2016 arbitration mailboxes to the Exchange 2010 database so we can delete the Exchange 2016 database and uninstall? Or is there another process we should be following? Nothing has been done with this Exchange 2016 server other than running the installation and having it fail multiple times on step 14/15.
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Mark BillExchange, AD, SQL, VMware, HPE, 3PAR, FUD, Anti MS Tekhnet, Pro EE, #1Commented:
No if you are talking about the new 2016 arbitration mailboxes just remove them and uninstall exchange again.

If you have concerns just run a CMD let to export these mailboxes to PST or even better take an image of the machine before doing it.
Better still take an image of both Exchange 2013 / Exchange 2016 and your PDC as I have no idea how far you have gone with this, I am imagining you have already prepared active directory etc.
greentriangleAuthor Commented:
Thanks Mark,

I took snapshots of both Exchange servers and the DC, and deleted some of the arbitration mailboxes. I wasn't able to delete all of them so I ended up moving them to the Exchange 2010 database and this seemed to work fine. I was able to remove the mailbox database, uninstall Exchange and start over after that.
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