diff --git a/.changeset/great-pears-applaud.md b/.changeset/great-pears-applaud.md
new file mode 100644
index 00000000000..b5a9558322b
--- /dev/null
+++ b/.changeset/great-pears-applaud.md
@@ -0,0 +1,5 @@
+---
+"@wso2is/identity-apps-core": patch
+---
+
+set root domain of proxy hostname in alor cookie
diff --git a/identity-apps-core/apps/recovery-portal/src/main/webapp/self-registration-process.jsp b/identity-apps-core/apps/recovery-portal/src/main/webapp/self-registration-process.jsp
index 382966995ab..59ea68cf0c3 100644
--- a/identity-apps-core/apps/recovery-portal/src/main/webapp/self-registration-process.jsp
+++ b/identity-apps-core/apps/recovery-portal/src/main/webapp/self-registration-process.jsp
@@ -359,9 +359,8 @@
             } else {
                 tenantAwareUsername = username + "@" + user.getTenantDomain();
             }
-            String domainName = application.getInitParameter(AUTO_LOGIN_COOKIE_DOMAIN);
             String hostName = ServiceURLBuilder.create().build().getProxyHostName();
-            String cookieDomain = IdentityUtil.isSubdomain(domainName, hostName) ? domainName : hostName;
+            String cookieDomain = IdentityUtil.getRootDomain(hostName);
 
             JSONObject contentValueInJson = new JSONObject();
             contentValueInJson.put("username", tenantAwareUsername);