---
title: "Application Installation Failure Due to Connectivity or Proxy Settings"
slug: "application-installation-failure-due-to-connectivity-or-proxy-settings"
updated: 2025-11-19T15:17:17Z
published: 2025-11-19T15:17:17Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.workspot.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Application Installation Failure Due to Connectivity or Proxy Settings

### **Summary**

Some applications fail to install on Workspot VMs when required files cannot be downloaded from vendor Content Delivery Networks (CDNs). This is typically caused by missing proxy settings, blocked URLs, or restricted outbound connectivity.

### **Issue**

Online installers (e.g., Microsoft 365, Adobe Creative Cloud, Zoom, Webex) may fail because the VM cannot reach the vendor CDN or update servers.

***Typical error:****“Unable to download required installation files from the CDN. Check your internet or proxy configuration.”*

### **Cause**

- Missing or incorrect proxy configuration
- Firewall/proxy blocking CDN URLs
- DNS or general connectivity issues

### **Resolution**

Configure or correct proxy and network settings:

1. Open **Control Panel → Internet Options → Connections → LAN Settings**
2. Enable the **Automatic configuration script** if required
3. Enter the correct proxy/PAC file (e.g., `http://proxy.company.com/proxy.pac`)
4. Apply settings and retry installation

Verify connectivity, and the installation should complete successfully.

### **Verification**

- Launch the app to confirm it works
- Test CDN access (`nslookup`/`ping` to vendor URLs)
- Review installer logs for successful file downloads

### **Prevention**

- Whitelist vendor CDN/update URLs
- Keep proxy/PAC configurations consistent
- Periodically validate outbound connectivity
- Use offline installers for restricted environments