How to have access to off line files with server 2008r2

There's no such a thing in a built-in 2008 => 2016 servers. So

I'd suggest that you  create a shared for the users group on each computer.

Then create the \\namespace\Computername
so all will have for each computer a specific "root\users" considering root as "\\namespace\computername"
So for each computer will be a root and a "users" folder within. this way if I don't remember badly, you could copy the information back and forth (using replication).

If this solution doesn't work the other point that you can do is to run a PowerShell script every night
Stations => Servers (move the user's info)
and Server => Stations

Those are a rain of ideas so far... or ask a developer team to create a synchronization service between the local and the remote folders.

DFS-R is for server replication, when you define a share caching settings is how you can make offline file available offline.
The folder options on the workstation has to have offline file option enabled.
As long as the user selects the redirected folder to be available offline and the above is permitted on the server...

On the workstations, the sync center handles the synchronization ....

\addomain\sharename
I would suggest not using servername in any context. The DFS' advantage is that the target systems where the shares really are can be changed at will without having an adverse impact on the user.

Folder redirection has to be reverted before the folder can be redirected to a new destination.
Settings on the folder redirection GPO should be configured to copy data back to profile if the GPO no longer applies.
The default GPO settings is commonly to do nothing such that the folder redirection remains in place, and you as the admin lose control and would need to manually revert/update or delete the profile so a new one can get created and have to copy data from the old location......

You can enable Always Offline mode in GPO by configure slow-link mode.  By default it sync data every 2h and you can change it by configure Background Sync.

Could you provide more detail on the slow link mode for server 2008 R2?

slow lionk mode is a detection mechanism for GPOs to DC.
run in a command window systeminfo | more
The default slow link detection is set at 500kb
the slow link detection mechanism impacts whether the GPOs should or should not be applied.
i.e. if a slow link is detected,. the GPOs will not apply.

You need to define what you are asking/hoping to achieve/.
Since windows 7 the "offline" detection is different from the slow link detection mechanism.  windows also has the network, internet check....

The work stations are all running Windows 10 PRO updated to 1709.  My want or desire would be to ensure that the workstations could access their documents pictures, etc if the server was down.  I am curious as to where the workstation copy would be stored also

Systeminfo|more  did not reveal any information about the slow link

It says whether a slow link, slow link level set at 500k.

Open control panel offline folders, there it lets you access the offline files. This is where the offline files are stored
Offline file cache of unsync
The sync center is also a way to access the offline repository location.
The repository is broken down based on paths .. And attributable to individual users.

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