Decommission Exchange 2010 but keep Hybrid Excahnge 2013

All,
We have finished migrating all users from our Exchange 2010 server to Office 365. We will retain the Exchange 2013 server that was installed during the hybrid configuration for mailbox management, relaying etc. There are no plans to store any many locally
on this server.
Questions:
1. Should the arbitration mailboxes be moved from the 2010 server to the 2013 server? Or can they be removed?
2. Are there any other considerations that need to be taken into account before uninstalling the 2010 sever?
Thanks

Yes, you should move the arbitration mailboxes - they are organizational mailboxes, not mailbox database mailboxes.
Make sure all Exchange resources and operations hosted on this server have been moved to your Exchange 2013 system before you remove Exchange from this server.  If you try to remove Exchange (in either the GUI or the command line) and something is
still using this server, you will be alerted that something is still using the server and will be told what it is.
HTH ...

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