diff --git a/src/Provider/Azure.php b/src/Provider/Azure.php
index ce71e3d..bbbb0fa 100644
--- a/src/Provider/Azure.php
+++ b/src/Provider/Azure.php
@@ -183,13 +183,15 @@ public function request($method, $ref, &$accessToken, $options = [])
         if (filter_var($ref, FILTER_VALIDATE_URL) !== FALSE) {
             $url = $ref;
         } else {
-            if (strpos($this->urlAPI, "graph.windows.net") === TRUE) {
+            if (strpos($this->urlAPI, "graph.windows.net") !== FALSE) {
                 $tenant = 'common';
                 if (property_exists($this, 'tenant')) {
                     $tenant = $this->tenant;
                 }
                 $ref = "$tenant/$ref";
 
+                $url = $this->urlAPI.$ref;
+
                 $url .= (strrpos($url, "?") === false) ? "?" : "&";
                 $url .= "api-version=".$this->API_VERSION;
             }