Troubleshooting tips for client communication to the Application Catalog:

Ensure that the Configuration Manager client is successfully assigned to a site and operational by checking LocationServices.log and ClientIDManagerStartup.log.

Verify that the client can communicate with the management point. For example, check out any HTTP errors in the CcmMessaging.log file.

Check the LocationServices.log file for any errors during the time you browsed to the Application Catalog. One typical reason for Application Catalog failures in this log is client communication failures to the management point, indicated by the following error: “Failed to send web service info Location Request Message.” In this case, verify that the management point is operational and reachable from the client computer.

If you have recently installed the Application Catalog roles, the configuration on the site system server might take some time to complete. If you have a central administration site, make sure that sites are replicating successfully. In this scenario, information about the Application Catalog roles must replicate to the central administration site and then back to the primary site before the Application Catalog is fully operational. For example, until the replication is complete, users will not be able to request or install applications from the Application Catalog.

Ensure that the domain and user name that is displayed in the top right corner of the Application Catalog matches the user that is logged in to Windows, especially if Internet Explorer prompts the user for credentials.

Ensure that any required Internet Explorer plugins are enabled and not explicitly blocked in Internet Explorer. For more information, see Prerequisites for Client Deployment in Configuration Manager on TechNet.

If you have configured client settings to add the URL to the trusted sites and the URL is not added to the trusted sites zone, check whether the client successfully downloads client policy and also check group policy settings in your environment to ensure that the Configuration Manager client can add the URL to the trusted sites zone.

If the Application Catalog shows an error page, the error will also be displayed in the ConfigMgrSoftwareCatalog.log. You can find the log file by searching the user profile folder. For example, in Windows 7, you can find the log file inside the following folder:

%systemdrive%\Users\<username>\AppData\LocalLow\Microsoft\Silverlight

Note that the error in this log most likely indicates one of the issues mentioned previously.

If you see the following error message when you request or install software in the Application Catalog, ensure that the domain and user name that is displayed in the top right corner of the Application Catalog matches the user that is logged in to Windows. If you are prompted for a user name and password, do not specify a different account from the one that you used to log in to Windows. In addition, you will see the same error message if the client setting Install permissions prevents you from installing software (for example,this setting is configured for Only administrators and your account is not a member of the local Administrators group).