Mailbox Move Exchange 2007 to Exchange 2013

I am trying to move an Exchange 2007 Mailbox to Exchange 2013 using the migration tool in Exchange Admin Center on Exchange 2013.  During the move process I get the status of "syncing" and then within 30 seconds it changes to "completed" however no email gets moved.  When checking the MSExchange Management Log I get "Cmdlet failed.  Cmdlet Get-MailboxCalendarConfiguration, parameters {identity=mydomain.org/Users/AdministratorAccount}.  When I go under details of event ID 6 it says "could not perform the operation on mailbox "mydomain.org/Users/AdministratorAccount" because the mailbox resides on a legacy server"  What am I missing to get a mailbox to migrate?
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John-PaulChief Operating OfficerAsked:
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Don S.Commented:
Are you up to date on the Rollups on your 2007 server?  What RU are you at?
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Simon Butler (Sembee)ConsultantCommented:
Primary reason I see for this a permission issue - usually permission inheritance is not enabled on the user account. I have also seen issues where the user is an admin, which can cause problems with the permissions required as well.

Simon.
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John-PaulChief Operating OfficerAuthor Commented:
It looks like it is a permissions issue however, not sure where the permissions issue is coming from.  It looks like our regular user accounts will migrate over however, administrator level accounts will not.  Any ideas?
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Simon Butler (Sembee)ConsultantCommented:
Administrator accounts shouldn't be mail enabled.
The best practise (and getting harder to work around) is that admin level users should have two accounts - a day to day account which is not an admin on the network (although can be a local admin on the workstation) and an admin account which is not mail enabled.

If regular accounts will move then you are probably going to have to change to the best practise.

Simon.
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John-PaulChief Operating OfficerAuthor Commented:
The issue was related to permissions on the individual mailboxes.  Once permissions were fixed the mailboxes transferred over just fine.
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