Replicate Offline MS Access (2010) to MS SQL Server 2012 - limited connection [on hold]

We currently have users working on an MS 2010 database linked to a MS SQL Server 2012 via linked tables.

I would like to have the users work offline due to a limited connectivity while working on-site. At the end of the day or periodically via a button the users would update the database with their changes. I have also heard about MS Access to SQL Server replication, but haven't found much on this.

I was thinking to do the following:

1. Firstly, use an update query whereby the current SQL server table would be
   downloaded.
2. Update the downloaded table with any change which were made to each record
   from a local table with the exact structure as the SQL Server table (each
   user would never work on the same record). I would use a date field/column to mark any record which had changed and needed to be updated (LasUpdated).

Should I use a series of update queries to update the linked tables or is there a better way?

Thanks in advance.