Index: lams_common/src/java/org/lamsfoundation/lams/integration/service/IntegrationService.java
===================================================================
diff -u -r861067fee4506484ebfc3bc0b73493227d9290df -r1b582702563fd61b5689539f801828aaf3efcec2
--- lams_common/src/java/org/lamsfoundation/lams/integration/service/IntegrationService.java	(.../IntegrationService.java)	(revision 861067fee4506484ebfc3bc0b73493227d9290df)
+++ lams_common/src/java/org/lamsfoundation/lams/integration/service/IntegrationService.java	(.../IntegrationService.java)	(revision 1b582702563fd61b5689539f801828aaf3efcec2)
@@ -31,6 +31,7 @@
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLConnection;
+import java.net.URLEncoder;
 import java.text.ParseException;
 import java.util.Date;
 import java.util.HashMap;
@@ -225,8 +226,10 @@
 			String timestamp = Long.toString(new Date().getTime());
 			String hash = hash(serverMap, extUsername, timestamp);
 			
+			String encodedExtUsername = URLEncoder.encode(extUsername, "UTF8");
+			
 			//set the values for the parameters
-			userDataCallbackUrl = userDataCallbackUrl.replaceAll("%username%", extUsername).replaceAll("%timestamp%", timestamp).replaceAll("%hash%", hash);
+			userDataCallbackUrl = userDataCallbackUrl.replaceAll("%username%", encodedExtUsername).replaceAll("%timestamp%", timestamp).replaceAll("%hash%", hash);
 			log.debug(userDataCallbackUrl);
 			URL url = new URL(userDataCallbackUrl);
 			URLConnection conn = url.openConnection();