mk6i-open-oscar-server/docs/AIM6.md

Windows AIM 6.x Client Setup

This guide explains how to install and configure AIM (versions 6.0–6.1) for use with Retro AIM Server.

Installation

1. Download AIM 6.x (recommended AIM 6.1.46.1) from the NINA wiki.
2. Run the installer and complete the installation.
3. Close the AIM application.
4. Open Task Manager and end the AIM (32 bit) process if it’s still running.

Configure Authentication Mode

AIM 6.x does not expose server settings via the UI. You'll need to edit configuration files manually.

To switch from the default Kerberos-based auth (AAM/AAMUAS) to BUCP:

1. Open Notepad as Administrator (Start → type "Notepad" → right-click → Run as Administrator).
2. In Notepad, go to File → Open.

3. Navigate to:

   C:\Program Files (x86)\AIM6\services\im\ver1_14_9_1
   

4. Change the file filter to All Files.

5. Open serviceManifest.xml.

6. Locate the aol.im.connect.mode and aol.im.connect.mode2 preferences and change them from AAM and AAMUAS to BUCP:

   -<preferenceDefault key="aol.im.connect.mode" scope="identity" type="string">AAM</preferenceDefault>
   +<preferenceDefault key="aol.im.connect.mode" scope="identity" type="string">BUCP</preferenceDefault>
   -<preferenceDefault key="aol.im.connect.mode2" scope="identity" type="string">AAMUAS</preferenceDefault>
   +<preferenceDefault key="aol.im.connect.mode2" scope="identity" type="string">BUCP</preferenceDefault>
   

7. Save the file.

Configure Server Hostname

To point the client to your Retro AIM Server:

1. In Notepad, go to File → Open again.

2. Navigate to:

   C:\Program Files (x86)\AIM6\services\imApp\ver6_1_46_1
   

3. Set the file filter to All Files.

4. Open serviceManifest.xml.

5. Find the aol.aimcc.connect.host.address preference and update it to match your OSCAR_HOST Retro AIM Server config:

   -<preferenceDefault key="aol.aimcc.connect.host.address" scope="identity" type="string">login.oscar.aol.com</preferenceDefault>
   +<preferenceDefault key="aol.aimcc.connect.host.address" scope="identity" type="string">127.0.0.1</preferenceDefault>
   

6. Save the file.

Enable Legacy JavaScript Engine (Windows 11 24H2+ Only)

AIM 6.x's frontend breaks under the new JavaScript engine introduced in Windows 11 24H2. A workaround described by axelsw.it forces Windows to use an older JavaScript engine compatible with AIM 6.x.

⚠️ Downgrading the JavaScript engine is generally a bad idea, as it may expose your system to vulnerabilities fixed in newer engines. Proceed at your own risk!

To implement the workaround, create a .reg file with the following content. Double-click the file in Windows Explorer to apply the change.

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main]
"JScriptReplacement"=dword:00000000