You want to change the default SAP logon screen below with your company logo.
Solution
Login to the portal administration page. Go to Content Administration > Web Resource Repository > Portal Content > Web Resources > Application Branding.
Right click on Application Branding and create a new folder (any name). In this example, we name it as ITsiti.
Upload the new image here.
Next, go to the NetWeaver administration page. Select Configuration > Security > Authentication and Single Sign-On.
Under Authentication tab, click on Properties.
Click on Modify. Under Logon Application, change the path or URL to branding image (ume.logon.branding_image). Click on Save to immediately apply the change. No restart is required.
Note: You can get the path or URL via View Source (right click on uploaded image from folder ITsiti above)
/com.sap.portal.resourcerepository/repo/application_branding_0/FOLDER-YOU-CREATED/THE-IMAGE-NAME
##Example##
/com.sap.portal.resourcerepository/repo/application_branding_0/ITsiti/Logo.jpg
You can now head back to the logon screen of your portal to see the new image.
