diff --git a/inventory.py b/inventory.py
index 67b11233..e2fb274f 100755
--- a/inventory.py
+++ b/inventory.py
@@ -19,6 +19,7 @@ def parse_params(logger):
     parser = OptionParser()
     parser.add_option("-u", "--user", help="specify user to log in", action="store", dest="user")
     parser.add_option("-p", "--password", help="specify password to log in", action="store", dest="password")
+    parser.add_option("-a", "--authsource", help="specify auth source to authenticate against", action="store", dest="authsource")
     parser.add_option("-o", "--port", help="specify inventory port", action="store", dest="port")
     parser.add_option("-m", "--config", help="Path to the configuration to set properties of the resources kept in "
                                              "the inventory", action="store", dest="config")
@@ -37,6 +38,10 @@ def parse_params(logger):
         os.environ['USER'] = options.user
     if options.password:
         os.environ['PASSWORD'] = options.password
+    if options.authsource:
+        os.environ['AUTHSOURCE'] = options.authsource
+    elif "AUTHSOURCE" not in os.environ:
+        os.environ['AUTHSOURCE'] = 'Local'
     if options.info:
         logger.setLevel(logging.INFO)
         ConsoleHandler.setLevel(logging.INFO)
diff --git a/tests/TestLaunchInventory.py b/tests/TestLaunchInventory.py
index e77e1c14..22173146 100644
--- a/tests/TestLaunchInventory.py
+++ b/tests/TestLaunchInventory.py
@@ -57,6 +57,7 @@ def test_with_cli_and_env_params(self):
                     '-s', '180']
         os.environ['USER'] = 'env_testuser'
         os.environ['PASSWORD'] = 'testps31!_2'
+        os.environ['AUTHSOURCE'] = 'Local'
         os.environ['PORT'] = '1123'
         os.environ['TARGET'] = '/wrong/path/to/atlas.yaml'
         os.environ['INVENTORY_CONFIG'] = 'wrong/path/to/config.yaml'
@@ -78,6 +79,7 @@ def test_env_params(self):
         os.environ.clear()
         os.environ['USER'] = 'testuser'
         os.environ['PASSWORD'] = 'testpw31!'
+        os.environ['AUTHSOURCE'] = 'Local'
         os.environ['PORT'] = '1234'
         os.environ['TARGET'] = 'vrops-vcenter-test.company.com'
         os.environ['INVENTORY_CONFIG'] = 'tests/inventory_config.yaml'
diff --git a/tools/Vrops.py b/tools/Vrops.py
index b3707f3d..b196ceeb 100644
--- a/tools/Vrops.py
+++ b/tools/Vrops.py
@@ -22,7 +22,7 @@ def get_token(target):
         }
         payload = {
             "username": os.environ['USER'],
-            "authSource": "Local",
+            "authSource": os.environ['AUTHSOURCE'],
             "password": os.environ['PASSWORD']
         }
         disable_warnings(exceptions.InsecureRequestWarning)