SBS 2008 Migration to Server 2012 R2 Essentials - what is actually migrated?

I have just migrated the emails on an SBS 2008 server to Exchange Online.

There is now talk of upgrading the server to Windows Server 2012 R2 Essentials. I have therefore been reading up on migrating as it is something I have not done before. I am pretty happy and confident with what i have read but I can't find the answers to a few, maybe stupid, questions that I need to clarify:

The Migration document I refer to is:

https://technet.microsoft.com/en-au/library/dn408633.aspx

1.  When you set the new server up as a replica Domain Controller and transfer the Operations Master Roles, what actually gets migrated? Specifically, Is it all the User Accounts and their personal data - Documents, Pictures etc? Will I therefore only have to move other shared folders such as a Company Folder and install relevant programs  - i.e Sage?

2. While this migration is ongoing, can the users continue to work as normal? Or is it better to do this out-of-hours? It is just that I am not based on-site and some users have a lot of data. If user data is moved as mentioned in point 1, then I would prefer just to leave it running through work day(s) and, once all migrated, complete the rest of the set up over a weekend.

Many thanks in advance for your answers.
Markieboy1Asked:
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Cliff GaliherCommented:
Only Active Directory is migrated. That would include domain user accounts, but would not include any data (documents, etch) that resides on the server. You'll need to plan separately for that.

Users can work as normal, but any data moves will interrupt that data temporarily. So moving sage has a maintenance window for sage. Moving a user's documents will interrupt access to those documents for that user. So it isn't a full interruption of the server, but individual pieces will need to be scheduled accordingly.
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Markieboy1Author Commented:
Many thanks for your answer Cliff.

Users will still have access to their data after the migration on the old server, I assume?

I can then move the data across at the weekend when no one is working (as mentioned in step 4 of the Migration Document I referenced) and complete and demote the old server before the start of the working week?

Or am I best doing it all on a weekend? We are talking around 15 users so any rough idea on how long the Migration of Active Directory may take?

On the note of moving user data, can I use Robocopy to move the folders as I know, by default, only the user has permission to the folder storing their data ( They are currently using Redirected folders ) or will I have to give the Server Administrator ownership to each folder?

Thanks again and sorry to ask a load more questions........
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Cliff GaliherCommented:
AD migration on a small scale takes minutes. Not hours. And any SBS install classifies as small. Robocopy usually works with the right flags, but backup/restore can access files that robocopy can't, so that is also an option.
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Markieboy1Author Commented:
Thanks again Cliff.

Backup on the SBS server is done by the built-in backup. Would I be able to access that and restore from the backup onto the new server.?

Or would I be better off using a third party backup program?
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Cliff GaliherCommented:
Built in backup would be fine. But robocopy will likely work. The backup mode flag can resolve most access issues.
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Markieboy1Author Commented:
Many, Many thanks Cliff. You have really helped.

I am sure I will be back with more questions closer to the time so keep your eye out!

In the meantime, thanks again.
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