How to Customize the Acumatica Login Screen Background (Branding Guide)

Hi everyone,

I’d like to share a simple but useful branding customization tip for Acumatica:
changing the background images on the Acumatica login screen.

This is a small change, but it helps reinforce company branding and improves the first impression for users logging into the system every day.

Below is the practical step-by-step approach we usually follow.

1. Prerequisites

Before making any changes, make sure you have:

• Administrator access to the Acumatica server (IIS)

• Background images in JPG format, recommended size 1500 x 1000 px

• Access to the Acumatica instance folder on the server

Default image location:

C:\Program Files\Acumatica ERP\{instance_name}\Icons 

(Replace {instance_name} with your actual instance name.)

2. Steps to change the login background

Step 1: Prepare your images

• Choose high-quality images aligned with your company branding

• Resize to 1500 x 1000 px

• Save as JPG

• Use the following naming convention:

  • login_bg1.jpg

  • login_bg2.jpg

  • login_bg3.jpg (and so on)

Step 2: Access the login image folder

• Log in to the Acumatica server

• Navigate to:

C:\Program Files\Acumatica ERP\{instance_name}\Icons

This folder contains the images used by the Acumatica login screen.

Step 3: Replace the default images

• Back up the existing files (recommended)

• Copy your new images into the folder

• Overwrite the existing login_bg*.jpg files

• Make sure file names match exactly

Step 4: Apply and verify

• Clear browser cache and refresh the login page (Ctrl + F5)

• Press F5 to cycle through background images

• If changes don’t appear, restart IIS:

iisreset 

3. Result

After completing these steps, the Acumatica login screen will display your customized background images instead of the default ones.

4. Important considerations

• Use JPG format only

• Keep the recommended image size to avoid distortion

• Always back up original files before replacing them

5. Notes on further branding

This method customizes the background images only.
For deeper branding (logos, colors, full white-labeling), Acumatica’s White Labeling options should be considered.

We also documented this guide with screenshots and examples here:
👉 https://s4.com.vn/en/how-to-customize-the-acumatica-login-screen-background/

Curious to hear from others:

• Have you customized your Acumatica login screen?

• Are you using branding or white-labeling features in production?

Hope this helps someone looking to improve the Acumatica user experience.