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Customer experience | Sales, Customer Insights,...
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installation of Microsoft Dynamics 365 Developer Toolkit fails

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To install the tool followed the steps from here
https://community.dynamics.com/blogs/post/?postid=a023918d-47ec-4938-94e9-9c85b6b6f7dd
Tried multiple options as per below but still couldn't resolve.. this stops my work for a month now. Need some one's help at asap.. thanks
 
  • Tried Central team’s suggestions.
  • Tried different online suggestions.
  • Tried to clear digital signature as error log says invalid signature.
  • Changed the data time format according to another working machine.
  • Changed OS.
  • Ran as admin .
  • changed the laptop and tried there also
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  • Suggested answer
    Amit Katariya007 Profile Picture
    10,409 Super User 2025 Season 2 on at
    The article that you are referring it it 7 years old..make sure you install sdk's which is present with updated versions.
     
    The error log you've provided indicates that the VSIX Installer encountered permission issues when trying to access or create directories under C:\Program Files (x86)\Common Files\Microsoft\ExtensionManager\Extensions. Specifically, it reports a System.UnauthorizedAccessException, which suggests that the process doesn't have the required permissions.
     
    Here are a few suggestions to resolve this issue:
     
    1. Run as Administrator: Make sure that you are running Visual Studio or the VSIX Installer with elevated privileges (right-click and choose Run as Administrator).
     
    2. Check File System Permissions: Ensure that your user account has the necessary permissions to write to the C:\Program Files (x86) directory. You can right-click the folder, go to Properties > Security, and modify the permissions if needed.
     
    3. Reset Extensions: The log suggests running the following command to reset Visual Studio extensions:
     
    devenv /updateconfiguration /resetextensions
     
    Run this command in an elevated command prompt (Run as Administrator).
     
    4. Disable Antivirus or Security Software: Sometimes, antivirus or other security software may block access to certain directories. Temporarily disabling it may help.
     
    5. Reinstall Visual Studio: If the issue persists, consider repairing or reinstalling Visual Studio to ensure all directories and permissions are properly set up.
     
    Let me know if you need more assistance!
     
    Thank you,
    Amit Katariya

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