Grant extra permissions for the IUSR account, used by the ISS web server

Symptoms

You get various HTML errors when trying to access the MassTransit web portal after you have configured MTWeb. 

In some cases you might be able to find ‘Access Denied’ error in the MT-PHPlog.log file located in:

• C:\Program Files (x86)\Group Logic\MassTransit Server\MTWeb\WebRoot

Cause

There exist several causes. The most common is a bug in PHP that could prevent access to required folders and files.

For more details please visit:

• #42832 scandir() fails unless user has permissions in the parent directory
• #43817 opendir() fails on Windows directories with parent directory unaccessible

Solution

It is necessary to grant extra permissions for the IUSR account, used by the ISS web server:

• Grant the local IUSR account "list folder / read data" permissions for the C:\PHP folder.

(!) The path to this folder might vary if you used non-default paths during the installation of the server or changed them afterward.