diff -Naru a/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/servlet/SsoPostLoginServlet.java b/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/servlet/SsoPostLoginServlet.java
--- a/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/servlet/SsoPostLoginServlet.java	2021-07-20 03:39:24.000000000 +0800
+++ b/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/servlet/SsoPostLoginServlet.java	2022-06-06 14:16:06.807214000 +0800
@@ -8,6 +8,7 @@
 
 import javax.naming.InitialContext;
 import javax.naming.NamingException;
+import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -41,7 +42,7 @@
     }
 
     @Override
-    public void init() {
+    public void init()  throws ServletException {
         String strVal = getServletConfig().getInitParameter("login-as-admin");
         if (strVal == null) {
             throw new RuntimeException("No login-as-admin init parameter specified for SsoPostLoginServlet.");
@@ -61,9 +62,8 @@
     @Override
     protected void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
         log.debug("Entered SsoPostLoginServlet");
-        String username;
+        String username  = null;
         String profile = null;
-        String authzName;
         InitialContext ctx = null;
         try {
             String error_description = request.getParameter("error_description");
@@ -90,12 +90,12 @@
             Map<String, Object> payload = (Map<String, Object>) jsonResponse.get("ovirt");
 
             username = (String) jsonResponse.get("user_id");
+            profile = "";
             int index = username.lastIndexOf("@");
             if (index != -1) {
                 profile = username.substring(index + 1);
                 username = username.substring(0, index);
             }
-            authzName = (String) jsonResponse.get("user_authz");
 
             try {
                 ctx = new InitialContext();
@@ -120,14 +120,12 @@
                                 "Unable to login user %s@%s with profile [%s]" +
                                         " because the maximum number of allowed sessions %s is exceeded",
                                 username,
-                                authzName,
                                 profile,
                                 maxUserSessions));
                     }
                     throw new RuntimeException(String.format(
                             "The user %s@%s with profile [%s] is not authorized to perform login",
                             username,
-                            authzName,
                             profile));
                 } else {
                     HttpSession httpSession = request.getSession(true);
@@ -143,9 +141,7 @@
             } catch (RuntimeException ex) {
                 throw ex;
             } catch (Exception ex) {
-                throw new RuntimeException(
-                        String.format("User login failure: %s@%s with profile [%s]", username, authzName, profile),
-                        ex);
+                throw new RuntimeException(String.format("User login failure: %s", username), ex);
             } finally {
                 try {
                     if (ctx != null) {
diff -Naru a/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/SsoUtils.java b/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/SsoUtils.java
--- a/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/SsoUtils.java	2021-07-20 03:39:24.000000000 +0800
+++ b/backend/manager/modules/aaa/src/main/java/org/ovirt/engine/core/aaa/SsoUtils.java	2022-06-06 14:19:02.265717000 +0800
@@ -33,7 +33,7 @@
     public static String createUserSession(HttpServletRequest req,
             Map<String, Object> jsonResponse,
             boolean loginAsAdmin) throws Exception {
-        String engineSessionId;
+        String engineSessionId = null;
         if (!FiltersHelper.isStatusOk(jsonResponse)) {
             throw new RuntimeException((String) jsonResponse.get("MESSAGE"));
         }
@@ -46,7 +46,6 @@
             profile = username.substring(index + 1);
             username = username.substring(0, index);
         }
-        String authzName = (String) jsonResponse.get("user_authz");
         try {
             ctx = new InitialContext();
             ActionReturnValue queryRetVal = FiltersHelper.getBackend(ctx).runAction(ActionType.CreateUserSession,
@@ -70,14 +69,12 @@
                             "Unable to login user %s@%s with profile [%s] " +
                                     "because the maximum number of allowed sessions %s is exceeded",
                             username,
-                            authzName,
                             profile,
                             EngineLocalConfig.getInstance().getInteger("ENGINE_MAX_USER_SESSIONS")));
                 }
                 throw new RuntimeException(String.format(
                         "The user %s@%s with profile [%s] is not authorized to perform login",
                         username,
-                        authzName,
                         profile));
             }
             engineSessionId = queryRetVal.getActionReturnValue();
@@ -90,8 +87,8 @@
                         true);
             }
         } catch (Exception ex) {
-            log.error("User '{}@{}' with profile [{}] login failed: {}", username, authzName, profile, ex.getMessage());
-            log.debug("User '{}@{}' with profile [{}] login failed", username, authzName, profile, ex);
+            log.error("User '{}@{}' login failed: {}", username, profile, ex.getMessage());
+            log.debug("User '{}@{}' login failed", username, profile, ex);
             throw ex;
         } finally {
             try {
@@ -139,7 +136,6 @@
         if (StringUtils.isNotBlank(alternateFqdnString)) {
             Arrays.stream(alternateFqdnString.trim().split("\\s *"))
                     .filter(StringUtils::isNotBlank)
-                    .map(String::toLowerCase)
                     .forEach(allowedDomains::add);
         }
 
@@ -148,7 +144,7 @@
 
     private static String parseHostFromUrl(String url, String urlPropertyName) {
         try {
-            return new URI(url).getHost().toLowerCase();
+            return new URI(url).getHost();
         } catch (URISyntaxException e) {
             throw new IllegalStateException(urlPropertyName + " not a valid URI: " + url);
         }
diff -Naru a/backend/manager/modules/aaa/src/test/java/org/ovirt/engine/core/aaa/SsoUtilsTest.java b/backend/manager/modules/aaa/src/test/java/org/ovirt/engine/core/aaa/SsoUtilsTest.java
--- a/backend/manager/modules/aaa/src/test/java/org/ovirt/engine/core/aaa/SsoUtilsTest.java	2021-07-20 03:39:24.000000000 +0800
+++ b/backend/manager/modules/aaa/src/test/java/org/ovirt/engine/core/aaa/SsoUtilsTest.java	2022-06-06 14:20:07.028614000 +0800
@@ -38,23 +38,6 @@
     }
 
     @Test
-    public void shouldMatchAppUrlDomainOnAlternateSSOEngineUrlRegardlessUpperCase() {
-        // given
-        EngineLocalConfig.getInstance(new HashMap<>() {
-            {
-                put("SSO_ENGINE_URL", "https://engine.example.com:8221/ovirt-engine");
-                put("SSO_ALTERNATE_ENGINE_FQDNS", "engine1.example.com ALTERNATE-engine.example.com");
-            }
-        });
-
-        // when
-        boolean valid = SsoUtils.isDomainValid("https://alternate-engine.EXAMPLE.com:20001/somerest/api_v9");
-
-        // then
-        Assertions.assertTrue(valid);
-    }
-
-    @Test
     public void shouldAllowBlankAppUrl() {
         // given
         EngineLocalConfig.getInstance(new HashMap<>() {
@@ -103,23 +86,6 @@
 
         // then
         Assertions.assertTrue(valid);
-    }
-
-    @Test
-    public void shouldMatchAppUrlDomainOnSSOEngineUrlRegardlessUpperCase() {
-        // given
-        EngineLocalConfig.getInstance(new HashMap<>() {
-            {
-                put("SSO_ENGINE_URL", "https://engine.EXAMPLE.com:30003/ovirt-engine");
-                put("SSO_ALTERNATE_ENGINE_FQDNS", "alternate-engine.example.com");
-            }
-        });
-
-        // when
-        boolean valid = SsoUtils.isDomainValid("https://ENGINE.example.com:20001/somerest/api_v9");
-
-        // then
-        Assertions.assertTrue(valid);
     }
 
     @Test
