Windows Server 2008 R2 Web Access

I recently set up a Terminal Services server with TS Web Access. I  have made all of the configurations and e activated the server with 20 user CAL.When iam  trying to access the published application i get the notorious error message " to logon to this computer you must be granted allow logon through ......I have added the users to remote Desktop users aswell as to the published application.Any help would  be appreciated.
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Hi Firtsware,

Have you tried this:
Control Panel -> Administrative Tools -> Local Security Settings

Under Local Policies -> User Rights Assignment

Open "Log On Locally" and add users you want to allow login to this.

Assign the user to The Allow log on through Terminal Services right using local policy (gpedit.msc).
Assign permission to use TS Configuration. Go to that, select the properties of RDP-Tcp.
The Allow logon to terminal server check box under user properties.
Assign the user to Access this computer from network.
Assign the user to Allow log on locally.

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