Although it is true that older versions of access will open in Access 2010, we have a couple of reasons to do the conversion. The first is the fact that the entire organization is migrating to Access 2010 so their is no need to keep the files in the older version. The second, and most important, is that we want to take advantage of some of the new features available in Access 2010 (Data Macros is one of the key advantages we want use). However, before we make the final decision, we want to know how much work will be involved in performing the conversion, to include all the time spent fixing issues that occur because of the conversion.