diff --git a/redfish/dmtf_tools/test_redfishtool.robot b/redfish/dmtf_tools/test_redfishtool.robot
index ff05c18..43f2d7a 100644
--- a/redfish/dmtf_tools/test_redfishtool.robot
+++ b/redfish/dmtf_tools/test_redfishtool.robot
@@ -20,6 +20,8 @@
 
 ${root_cmd_args}       redfishtool raw -r ${OPENBMC_HOST} -u ${OPENBMC_USERNAME} -p ${OPENBMC_PASSWORD} -S Always
 ${min_number_sensors}  ${15}
+${min_number_roles}    ${4}
+${min_number_users}    ${1}
 
 *** Test Cases ***
 
@@ -74,8 +76,64 @@
     Should Be True  ${status} == False
 
 
+Verify Redfishtool Login With Deleted Redfish Users
+    [Documentation]  Verify login with deleted user via Redfishtool.
+    [Tags]  Verify_Redfishtool_Login_With_Deleted_Redfish_Users
+
+    Redfishtool Create User  "UserT100"  "TestPwd123"  "Operator"  true
+    Redfishtool Delete User  "UserT100"
+    Redfishtool Access Resource  /redfish/v1/AccountService/Accounts  "UserT100"  "TestPwd123"  ${HTTP_UNAUTHORIZED}
+
+Verify Redfishtool Error Upon Creating Same Users With Different Privileges
+    [Documentation]  Verify error upon creating same users with different previleges.
+    [Tags]  Verify_Redfishtool_Error_Upon_Creating_Same_Users_With_Different_Privileges
+    [Teardown]  Redfishtool Delete User  "UserT100"
+
+    Redfishtool Create User  "UserT100"  "TestPwd123"  "Operator"  true
+    Redfishtool Create User  "UserT100"  "TestPwd123"  "Administrator"  true  expected_error=${HTTP_BAD_REQUEST}
+
+
+Verify Redfishtool Admin User Privilege
+    [Documentation]  Verify previlege of admin user.
+    [Tags]  Verify_Redfishtool_Admin_User_Privilege
+    [Teardown]  Run Keywords  Redfishtool Delete User  "UserT100"  AND
+    ...  Redfishtool Delete User  "UserT101"
+
+    Redfishtool Create User  "UserT100"  "TestPwd123"  "Administrator"  true
+
+    # Verify if an user can be added by admin
+    Redfishtool Create User  "UserT101"  "TestPwd123"  "Operator"  true  "UserT100"  "TestPwd123"
+
+
+Verify Redfishtool ReadOnly User Privilege
+    [Documentation]  Verify Redfishtool ReadOnly user privilege works.
+    [Tags]  Verify_Redfishtool_ReadOnly_User_Privilege
+    [Teardown]  Redfishtool Delete User  "UserT100"
+
+    Redfishtool Create User  "UserT100"  "TestPwd123"  "ReadOnly"  true
+    Redfishtool Access Resource  /redfish/v1/Systems/  "UserT100"  "TestPwd123"
+
+    Redfishtool Create User
+    ...  "UserT101"  "TestPwd123"  "Operator"  true  "UserT100"  "TestPwd123"  ${HTTP_FORBIDDEN}
+
+
 *** Keywords ***
 
+Redfishtool Access Resource
+    [Documentation]  Access resource.
+    [Arguments]  ${uri}   ${login_user}  ${login_pasword}  ${expected_error}=""
+
+    # Description of argument(s):
+    # uri            URI for resource access.
+    # login_user     The login user name used other than default root user.
+    # login_pasword  The login password.
+    # expected_error Expected error optionally provided in testcase (e.g. 401 /
+    #                authentication error, etc. )
+
+    ${user_cmd_args}=  Set Variable
+    ...  redfishtool raw -r ${OPENBMC_HOST} -u ${login_user} -p ${login_pasword} -S Always
+    Redfishtool Get  ${uri}  ${user_cmd_args}  ${expected_error}
+
 
 Is HTTP error Expected
     [Documentation]  Check if the HTTP error is expected.
@@ -91,7 +149,7 @@
 
 Redfishtool Create User
     [Documentation]  Create new user.
-    [Arguments]  ${user_name}  ${password}  ${roleID}  ${enable}  ${expected_error}=""
+    [Arguments]  ${user_name}  ${password}  ${roleID}  ${enable}  ${login_user}=""  ${login_pasword}=""  ${expected_error}=""
 
     # Description of argument(s):
     # user_name      The user name (e.g. "test", "robert", etc.).
@@ -101,9 +159,13 @@
     # expected_error Expected error optionally provided in testcase (e.g. 401 /
     #                authentication error, etc. )
 
+    ${user_cmd_args}=  Set Variable  redfishtool raw -r ${OPENBMC_HOST} -u ${login_user} -p ${login_pasword} -S Always
     ${data}=  Set Variable  '{"UserName":${user_name},"Password":${password},"RoleId":${roleId},"Enabled":${enable}}'
-    Redfishtool Post  ${data}  /redfish/v1/AccountService/Accounts  ${root_cmd_args}
-    ...  ${expected_error}
+    Run Keyword If  ${login_user} == ""
+    ...   Redfishtool Post  ${data}  /redfish/v1/AccountService/Accounts  ${root_cmd_args}  ${expected_error}
+    ...   ELSE
+    ...   Redfishtool Post  ${data}  /redfish/v1/AccountService/Accounts  ${user_cmd_args}  ${expected_error}
+
 
 Redfishtool Update User Role
     [Documentation]  Update user role.
@@ -118,8 +180,12 @@
     # expected_error Expected error optionally provided in testcase (e.g. 401 /
     #                authentication error, etc. )
 
-    Redfishtool Patch  '{"RoleId":${newRole}}'  /redfish/v1/AccountService/Accounts/${user_name}
-    ...  ${root_cmd_args}  ${expected_error}
+    ${user_cmd_args}=  Set Variable  redfishtool raw -r ${OPENBMC_HOST} -u ${login_user} -p ${login_pasword} -S Always
+    Run Keyword If  ${login_user} == ""
+    ...   Redfishtool Patch  '{"RoleId":${newRole}}'  /redfish/v1/AccountService/Accounts/${user_name}  ${root_cmd_args}  ${expected_error}
+    ...   ELSE
+    ...   Redfishtool Patch  '{"RoleId":${newRole}}'  /redfish/v1/AccountService/Accounts/${user_name}  ${user_cmd_args}  ${expected_error}
+
 
 Redfishtool Delete User
     [Documentation]  Delete an user.