UPDATE: From the Autodesk Knowledge Network Site:
This Hotfix addresses a problem with Exchange Apps that target the AutoCAD 2017-based products.
Description of Problem: Exchange Apps may not display on the Add In tab after installing the AutoCAD 2017 Service Pack 1 if settings are reset. Commands for Exchange Apps may no longer work. Newly installed Exchange Apps might not load.
The following products are affected after installing the Service Pack 1 for AutoCAD 2017-based products:
- AutoCAD 2017
- AutoCAD Map 3D 2017
- AutoCAD Civil 3D 2017
- AutoCAD Mechanical 2017
- AutoCAD Electrical 2017
- AutoCAD Architecture 2017
- AutoCAD MEP 2017
- AutoCAD P&ID 2017
- AutoCAD Plant 3D 2017
- AutoCAD Utility Design 2017
If the solution provided by Autodesk does not resolve the issue, this is the alternative fix to try:
If you have installed the plug in application and it does not load when you launch AutoCAD you may need to try this fix:
Locate this file:
Within the XML file there is a call to load a DLL file.
Modify that line in the XML file to read like this: