Nathan,
The explanation is listed on page 30 of the MultiCompany manual found under Applications> User Guides folder
Processing Inter-Company Transactions Between Different Databases
When transferring data between companies that reside in different application databases, it is necessary to export the data from one database and import it into the next.
Exporting Company Data from a Database
Use the following procedure to export data from an application database when transferring it to a company in a different application database.
1. Log in to the application database of the company from which the data is being exported.
2. Choose Module | Multi-Company | Screens | Inter-Company Export/Import. Inter-Company Export/Import (13.510.00) displays.
3. Select Export Inter-Company Transactions.
4. Enter the company ID from which transactions will be exported.
5. Enter the ledger ID from which transactions will be exported.
6. Enter the period for which transactions will be exported.
7. Enter the file path to which the data should be exported, or click the Folder icon to open Path Selection (13.510.01) and browse to the appropriate directory.
8. Click Begin Processing.
Importing Company Data to a Database
Use the following procedure to import data from an application database when transferring it from a company in a different application database.
1. Log in to the application database of the company to which the data is being imported.
2. Choose Module | Multi-Company | Screens | Inter-Company Export/Import. Inter-Company Export/Import (13.510.00) displays.
3. Select Import Inter-Company Transactions.
4. Enter the company ID to which transactions will be imported.
5. Enter the ledger ID to which transactions will be imported.
6. Enter the period for which transactions will be imported.
7. Enter the file path from which the data should be imported, or click the Folder icon to open Path Selection (13.510.00) and browse to the appropriate directory.
8. Select the files to be imported from the list under Available Files. Use >> to transfer individual files, or use Select All >> to transfer all of the files. Those files transferred to Selected Files will be imported.
Note: The exported files listed under Available Files are named by concatenating the Due From/Due To company ID, the batch number, and the module (for example, 0060-To-0010-000141-GL.exp).
9. Click Begin Processing