The most common reason for this error is a broken or outdated Autodesk Identity component. This can often happen after software updates, reinstalling the program, or making changes to your system. Other possible causes include a damaged login cache, incorrect Single Sign-On (SSO) setup, or missing TLS security files on Windows. In this guide, we’ll walk you through different methods to fix the “Autodesk Requested Service Not Available” error.

1. Change the Time Zone

This error can often occur when your computer’s time zone doesn’t match the current local time. It’s important to check and adjust your system clock and time zone according to your region.

2. Turn Off Your VPN Connection

Autodesk programs usually don’t work well with a VPN connection. Because VPNs act as third-party networks, they can interfere and cause login errors

3. Create a New Windows User Profile

A corrupted Windows user profile can prevent you from logging in to Autodesk, causing this error. If you suspect your profile might be corrupted, you should create a new Windows user profile. Before creating a new one, back up your important data to avoid losing it.

4. Update Your Windows

An outdated version of Windows can sometimes interfere with Autodesk products, leading to login or connectivity issues. Make sure your Windows is fully updated.

5. Disable Windows Protection

Windows protections like Windows Defender or Firewall can sometimes block Autodesk software from running correctly. To see if they are causing your issue, try temporarily disabling them.

5.1. Disable Windows Defender via Command Prompt

6. Delete Corrupted Login Cache

A corrupted login cache might be stopping Autodesk from logging you in. To resolve this, you can delete the local Autodesk login cache using these steps:

6.1. Login Reset Tool

7. Update the Autodesk Single Sign-On Component

If your Autodesk Single Sign-On (AdSSO) component is outdated, you might face login issues. It’s important to update AdSSO to the latest version. Here’s how to do it manually:

7.1. Autodesk Single Sign-In Update Installer

8. Manually Update the DLL Files (AutoCAD)

If your libeay32_Ad_1.dll and ssleay32_Ad_1.dll files are outdated (earlier than 2018), it can also cause this error. To manually update these, follow:

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