I am following the instructions in the deployment assistant to migrate an in-place Exchange 2010 setup to a new Exchange 2013 server. I have reached the stage of migrating the arbitration mailbox from its original server to a database on the new one. This process has now been running for 7 hours and as far as I can see the migrated mailbox size is larger than the database which used to house it. The deployment assistant estimates this stage as requiring 10 minutes to complete.
Is there a problem and if so what can I do to resolve the issue?
