1. In IIS Manager, expand Server Name, expand Sites, and select the Archive Manager web site, In the centre pane double click on Authentication and make sure that only Integrated Windows Authentication is enabled.
2. Under the ArchiveManager website select the defaultinstance virtual directory, In the centre pane double click on Authentication and make sure that only Integrated Windows Authentication is enabled.
Open a command prompt and enter IISReset.
If forms based authentication is required as well you can add a second website with forms based authentication enabled.
https://support.quest.com/archive-manager/kb/126109
