Problem: After removing Domain/LDAP auth (Leaving a domain) on a Synology NAS it still shows the Basic Authentication prompt on the browser
Examples of Basic Auth Prompts for Google Chrome, Firefox and Microsoft Edge
![](https://toggen.com.au/wp-content/uploads/2024/04/2024-04-01-10_57_07-ONEPB-NAS01-Synology-RackStation.png)
![](https://toggen.com.au/wp-content/uploads/2024/04/2024-04-01-10_57_56-ONEPB-NAS01-Synology-RackStation-—-Mozilla-Firefox.png)
![](https://toggen.com.au/wp-content/uploads/2024/04/ms-edge.png.png)
Cause: Integrated Windows Authentication was not switched off before removing Domain/LDAP
Resolution: Re-join a Domain, toggle Integrated Windows Authentication to off and then leave the Domain.
Open Control Panel => Network => Network Interface and point the Synology NAS DNS Server setting to resolve against an Active Directory or Synology Directory Services server on the network.
Open Control Panel => Domain / LDAP => Click join and enter the domain name and details of the AD DNS Server or Synoloyg Directory Services Server (ie. another Synology NAS if you have one).
After re-joining a domain, click the Settings button on the Domain/LDAP panel and turn off IWA (Integrated Windows Authentication)
Click the Leave Domain button and edit the Network settings
![](https://toggen.com.au/wp-content/uploads/2024/04/2024-04-01-15_43_01-ONEPB-NAS01-Synology-RackStation-1024x584.png)
After turning off IWA click Leave Domain.
You can now test logout and login to the Synology NAS with a Browser and it should no longer show the Basic Auth prompts.
![](https://toggen.com.au/wp-content/uploads/2024/04/2024-04-01-15_45_16-ONEPB-NAS01-Synology-RackStation-1024x590.png)
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