Overview

When attempting to install GFI MailEssentials, you receive the following error:

ASP.Net web service is prohibited on this server

Environment

• GFI MailEssentials
• All supported environments

Root Cause

ASP.NET Web service extension is set to 'Prohibited' in Internet Information Services (IIS).

Resolution

Note: In order to perform the following procedures, you must be a member of the Administrators security group on the server.

To change the status of a Web Service Extension in IIS 6.0:

1. Choose Start > Administrative Tools > Internet Information Services (IIS) Manager.
2. In the tree pane, click Web Service Extensions.
3. Right-click the name of the extension specified in the error message (usually ASP.NET 4) and click Allow.
4. The status should change to Allowed. 

To change the status of a Web Service Extension in IIS 7.0:

1. Choose Start > Administrative Tools. Right-click Internet Information Services (IIS) Manager and choose Run as administrator.
2. In the Connections pane, click the Server node.
3. In the Feature View pane, double-click ISAPI and CGI Restrictions.
4. Right-click the name of the extension that the error message specifies (usually ASP.Net 4) and click Allow.
5. The status should change to Allowed.

Note: ISAPI stands for Internet Server Application Programming Interface and CGI stands for Common Gateway Interface.