To enable communication between Commusoft and Sage Desktop, you must install a program called the Sage Interface. Follow this guide carefully for correct installation or reinstallation.
🧭 Installing the Sage Interface
System Requirements
Install the Sage Interface only on the PC or server hosting your Sage 50cloud Accounts database.
That same machine must also have the Sage 50cloud Accounts Client installed.
Do not use network paths—use only local paths accessible directly by the Sage system.
Do not install the interface on more than one machine—only install it on the main Sage server.
Permissions & Environment
You must have full administrator privileges.
You will need access to Commusoft as Owner/manager.
Ensure the Sage 50cloud Accounts Client is completely closed before continuing.
Do not enable automatic sync until the full setup is complete.
Anti virus: If antivirus is installed, configure it to allow the interface:
Allow both the download and installation.
Add exclusions:
Folder:
C:\Program Files (x86)\SageInterfaceProgram:
SageInterfaceService.exe
Download and Install the Interface
From the setup screen in Commusoft, download the interface file.
If reinstalling go to Quiclinks
Locate the file in your downloads, right-click
Choose Run as administrator.
Create a Commusoft Access User
Commusoft needs access to a Sage user account.
Recommended test credentials:
Username: cs
Password: cs123
Credential Entry: When prompted, verify the following fields.
Sage username and password
Enter the details you just created.
Database location: this must end with
.accdataIn Sage, go to Help > About
Locate the data path field
Click through to the Windows folder
Click into the file path of the
.accdatafolderCopy and paste it into Commusoft
Confirm that the path ends with
.accdatabefore proceeding
VAT method and rate codes
20%, 5%, 0% Enter the relevant T codes
Required
Domestic reverse VAT codes
Not required
Click Confirm to save and continue.
Confirming setup
After completing credential setup, the Sage Interface service needs to be monitored to ensure it's running correctly.
Open Services:
Click the Windows search
Type Services, and select it from the menu to open.
Locate Sage Interface Service, right-click it, and choose Properties.
Set the Startup type to Automatic (Delayed Start).
Open Event Viewer:
Click the Windows search
Type Eventviewer, and select it from the menu to open.
In the left-hand menu, go to Windows Logs > Application.
Look for entries labeled Sage Interface to verify service startup.
You will need to refresh the Event Viewer to see new events. If a new event has been logged, you'll see a banner at the top that says (!) New event available. Click this banner or refresh manually to update the log view.
Wait up to 15 minutes for the Sage Interface services to fully initialize.
Not seeing all 17 events: Restart the Sage Interface service and refresh Event Viewer. If events are still missing, check your antivirus exclusions and credential settings.
See below for more details on the events.
Event Log Breakdown
Event Log Breakdown
The Sage Interface generates 17 distinct events in the Windows Event Viewer under Windows Logs > Application. Below are the exact log messages, grouped by stage, to help you verify that the service has started and initialized correctly.
🟢 Initialization Events
Sage Interface executed
Logging before call accounts
Before transaction component call
Successfully initiated CsSageObject
After transaction component call
Sage client version check
📦 Processing Events
Processed customers
Processed suppliers
Processed customer invoices
Processed supplier invoices
Processed customer payments
Processed customer credit notes
Process supplier payments
Processed supplier credit notes
Processed customer credit notes allocation
Processed supplier credit notes allocation
✅ Completion Event
Successfully moved all the records to sage
Next steps
Once initialized, return to Commusoft
Tick the installation checkbox, and click Next.
You will now see the active Accounting Dashboard to continue setup.
Confirm that all nominal codes are set up and linked
Check your Creditor days are set.
🔁 Uninstall the interface
Go to Windows Search → "Control Panel"
Open Control Panel, then view by Large Icons
Select Programs and Features
Find and uninstall Sage Interface