Learn Editor: Update mto-requirements.md

Author: diannegali

defender-xdr/mto-requirements.md

@@ -81,8 +81,8 @@ The first time you use Microsoft Defender multitenant management, you need setup
 
 3. Choose the tenants you want to manage and select **Add**
 
->[!Note]
-> The Microsoft Defender multitenant view currently has a limit of 50 target tenants.
+> [!Note]
+> The Microsoft Defender multitenant view currently has a limit of 100 target tenants.
 
 The features available in multitenant management now appear on the navigation bar and you're ready to view and manage security data across all your tenants.