When you start to create a new link configuration you use OleDb data source (UDL).

After clicking on Browse you choose a location for your UDL file and type in a file name. In this example the UDL file will be created in the project's Related Files folder.

Next the Windows Data Link Properties dialog pops up. If you need more info or support for this dialog use the Help button.

By default there is no Provider for MS Access. You can download the Microsoft Providers under the following link:

https://www.microsoft.com/en-us/download/details.aspx?id=54920

After selecting your language you can then download the Provider. Make sure, that you install the 64Bit version.

After installing the EXE you can select the Microsoft Office 16.0 Access Database Engine OLE DB Provider. Over time there may be newer versions you can install.

Under the Connection tab you copy the path + file name of your MS Access Database. If the database is in same location as the UDL file, then you can simply use the file name with extension. However, the PlantLink Wizard will also take care of it as you will see below.

Finally, you should click on the Test Connection button to make sure the Data Source can be connected to.

You will get this success message.

In the PlantLink Wizard you will now see the path and file name of your new UDL file.The Wizard checks if the path to the UDL file can be change to a relative path. This makes it easier in case you later want to copy the project. Then there is no need to adapt the Link Configuration.

All following pages in the PlantLink Wizard are the same as when using SQLite database as described for example under Create an Update Link.
 

If you want to edit the UDL files you simply click on the Edit button. This opens the Data Link Properties dialog again. As mentioned above, if the MS Access Database is in the same folder as the UDL file, then the PlantLink Wizard will remove the path to the Data Source.

You can also just double-click on the file in Windows File Explorer which opens the Data Link Properties dialog too.

If you make changes outside the Wizard make sure you open the PlantLink main dialog and click on the Refresh button before testing, because PlantLink will not recognize changes to the Link Configurations (and in extension the UDL files) when they are already loaded on project load.

If you already have an UDL file you can use this as well. Maybe consider moving it under the project.

To use an existing UDL file you click on the Browse button.

Now you can open the existing UDL file.

If possible, the Wizard will adapt the path to a relative path if possible (for the reasons described above).