# What is Service URL during System Configuration?

### Description

During system configuration, there is a field where user needs to enter the Service URL. Now what does <code class="expression">space.vars.SITENAME</code> accept in the Service URL field.

### Solution

Service URL is a mandatory field during system configuration that is used to provide OpsHubTFSService URL. <code class="expression">space.vars.SITENAME</code> requires OpsHubTFSService to communicate with Team Foundation Server (TFS) and Azure DevOps.

Refer [Why  needs OpsHubTFSService?](https://docs.opshub.com/v7.216/help-center-index/faqs/tfs-faqs/purpose-of-opshubtfsservice) section to learn more about OpsHubTFSService.

You need to register OpsHubTFSService before providing URL in Service URL field. Refer [How to register OpsHubTFSService?](https://docs.opshub.com/v7.216/help-center-index/faqs/tfs-faqs/register-opshubtfsservice) to learn about how to register OpsHubTFSService.

By default, OpsHubTFSService is registered on port number `9090`, but in case you want to register on a different port, then refer [How to change default OpsHubTFSService port number?](https://docs.opshub.com/v7.216/help-center-index/faqs/tfs-faqs/register-opshubtfsservice-other-port).