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For Fiddler Everywhere, the recommended device-wide Intune deployment is a Win32 app installed with FiddlerSetup.exe /S /allusers and Install behavior: System. The installer switch sets Fiddler’s scope; Intune’s System setting supplies the device context and administrative privileges. For a current-user deployment, pair /currentuser with User behavior. Fiddler Classic is a separate product: its documented silent command is FiddlerSetup.exe /S, and you should not assume it supports Everywhere’s scope switches.
First, identify which Fiddler you have
“Fiddler” can mean two Windows products with different deployment guidance:
- Fiddler Everywhere: Telerik documents silent installation plus
/allusers,/currentuser, and a custom-path option. Its Intune deployment guide is the basis for the commands below. - Fiddler Classic: the official documentation gives
FiddlerSetup.exe /Sfor a silent installation. It does not establish that Classic supports Everywhere’s scope switches. See the Fiddler Classic documentation.
Do not package one product and copy the other product’s install switches or assumptions. Confirm the downloaded installer and version before building the app.
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Two separate settings determine how deployment works:
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- Installer scope tells the Fiddler installer whether to install for all users or only the current user.
- Intune Install behavior tells Intune whether to run the Win32 installer in System or User context.
For Fiddler Everywhere, align them as follows:
| Goal | Install command | Intune Install behavior |
|---|---|---|
| Make Fiddler available across the device | FiddlerSetup.exe /S /allusers |
System |
| Install only for the assigned user | FiddlerSetup.exe /S /currentuser |
User |
Telerik documents /currentuser as the default Fiddler Everywhere scope; specifying it explicitly makes the intended behavior clear. The /allusers option requires administrative privileges, which System context can provide. Microsoft describes System as device-wide context and User as context for a particular user; a System-context app can install when no user is logged in. See Microsoft’s Win32 app deployment guidance.
System does not, by itself, turn a per-user installer into a machine-wide installation. The installer must support the requested scope and receive the right switch. User context also has consequences: files, shortcuts, registration, detection, and removal may be specific to that user profile. For Fiddler Classic, use its documented silent switch and validate the installer’s scope and behavior against the exact release rather than adding Everywhere-only options.
Package the installer as an Intune Win32 app
Download the appropriate Windows installer from Telerik and place it in a clean source directory. For example:
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FiddlerSetup.exeUse the Microsoft Win32 Content Prep Tool to create the .intunewin file:
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IntuneWinAppUtil.exe -c C:IntuneSourceFiddlerEverywhere -s FiddlerSetup.exe -o C:IntuneOutputHere, -c is the source folder, -s is the setup file, and -o is the output folder. Adjust the filename and paths to match your download. Keep the source folder limited to the files required by the install workflow. Upload the generated package as a Windows app (Win32) in Intune. Microsoft’s Win32 app setup instructions cover the creation flow and its configuration fields.
Configure the app in Intune
- In the Intune admin center, go to Apps > All apps, select Create, and choose Windows app (Win32).
- Upload the
.intunewinpackage and enter the app details. - Set the install command for the product and scope you selected. For all-user Fiddler Everywhere, enter
FiddlerSetup.exe /S /allusers. For current-user Everywhere, enterFiddlerSetup.exe /S /currentuser. For Classic, enterFiddlerSetup.exe /Sand confirm the actual filename. - Set Install behavior to System for the device-wide Everywhere configuration or User for the current-user configuration.
- Configure requirements and a detection rule. Add the uninstall command only after validating it for the installed product, build, and scope.
- Assign the app to a test device or user first. Confirm installation, detection, launch, and removal before expanding deployment.
Intune Win32 deployments must be noninteractive; an installer that prompts or requires a user to click through dialogs is not suitable as-is. The Intune Management Extension processes these apps, and assignment processing is not an immediate-install guarantee. Microsoft says the extension checks for new Win32 assignments approximately hourly or after a service or device restart; monitor deployment status rather than assuming the app will appear as soon as an assignment is saved. See Microsoft’s Win32 app management overview.
Set detection against the installed application
Detection determines whether Intune considers the app installed. Use a rule that verifies the application itself, not the setup executable in the package or content cache.
- File rule: detect the installed Fiddler executable at the path confirmed for the deployed product and version. The exact executable name and location can vary, so verify them on a test device before configuring the rule.
- Registry rule: use an uninstall registration only after confirming that it is stable for the chosen product and scope. Per-user and machine-wide installs may register in different places.
- Custom detection script: consider this when paths or scopes vary or when the rule needs to distinguish the intended machine installation from an older per-user installation.
Do not use FiddlerSetup.exe as proof of installation. A Telerik forum discussion describes a deployment failure caused by checking the setup file rather than the installed application executable; treat the example as troubleshooting context, not as a universal current path. See Telerik’s detection discussion.
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A successful installer exit code does not guarantee Intune will report success: the configured detection rule must also find the expected artifact. If you use a version requirement, first verify the file version reported by the deployed build. Avoid treating a directory that can be created before installation finishes as sufficient proof.
Handle uninstall deliberately
There is no universal uninstall command established here for every Fiddler product, build, and installation scope. Do not guess a command such as uninstall.exe /S. Use the vendor-provided uninstaller or uninstall registration for the exact installed build, and test it locally in the same context Intune will use.
A PowerShell wrapper can be useful if the uninstaller must be located dynamically or needs logging, quoting, or silent arguments. A robust wrapper should identify the relevant machine or user installation, obtain its registered uninstall command, invoke it with the appropriate noninteractive options, log the result, and return a meaningful exit code. Microsoft notes that environment-variable expansion is not supported directly in the Win32 uninstall command field; use a wrapper if the workflow depends on environment variables. Make sure the uninstall context matches the installation scope.
Test before assigning broadly
Validate the package and command on a pilot device using the same context planned for deployment. For a device-wide Fiddler Everywhere rollout, test the System command FiddlerSetup.exe /S /allusers; do not rely only on a manual install performed from an administrator’s logged-in desktop.
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- Confirm that installation finishes without dialogs and capture the process exit code.
- Test whether the app installs when no user is logged in, if that is a requirement.
- Check the executable location, version, shortcuts, uninstall registration, and Intune detection result.
- Sign in as a standard user and confirm that the app is available in the intended scope.
- Test uninstall in the same context and verify that detection changes to not installed.
- Review Intune Management Extension logs on the device when results do not match expectations.
A manual install that succeeds only with prompts, an interactive desktop, a particular user’s profile, or network access unavailable to the System account does not demonstrate that the package will work through Intune. If System installation fails, check the exact silent switch, whether the installer downloads extra content, profile-dependent paths, and whether you reproduced the System context in testing. Use a wrapper for prerequisites, logging, or post-install configuration; do not rely on UI automation to force an interactive installer into a user session.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Troubleshooting common deployment problems
Intune reports success, but users cannot find Fiddler
Check whether the app landed in a different user profile, whether the installer used current-user scope, or whether a System-context install created a shortcut only in a particular profile. Verify the executable and uninstall registration in both the expected machine location and relevant user profile. Then correct the scope or detection rule and retest. With Fiddler Everywhere, users may also need to sign in; installation alone does not complete account authentication.
Installation succeeds, but Intune reports a detection error
Confirm the executable’s actual path and name on the pilot device, and make sure detection checks the installed application rather than FiddlerSetup.exe. Check whether the deployment is per-user or machine-wide and whether a registry rule is looking in the correct view. Error 0x87D00324 is commonly associated with a detection rule that does not find the expected installed result; investigate detection before assuming the installer itself failed.
Installation fails as System but works manually
Reproduce the test under System context. An elevated administrator session is not the same environment: it may have a desktop, profile, network access, or environment variables unavailable to the Intune process. Confirm that the installer accepts /S, does not require interaction, and can reach any content it needs under System. Capture the exit code and logs. Microsoft does not support interactive application installation for this Win32 workflow.
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Fiddler is installed for only one user
For Fiddler Everywhere, check for /currentuser or an installer default that selected the current user. If the goal is device-wide availability, remove the old per-user installation as appropriate, then deploy FiddlerSetup.exe /S /allusers with System behavior. Update detection so an old profile-specific copy does not falsely satisfy the device-wide rule.
Uninstall fails from Intune
Check whether the app was installed per-user but Intune is invoking removal as System, whether the uninstall registration is in the user hive, and whether the command includes variables that Intune’s command field will not expand. Use a tested wrapper when needed, and align removal context with installation scope.
Check prerequisites, sign-in, and governance
Before rollout, check the current Fiddler Everywhere Windows requirements for supported Windows versions, disk space, and required network access. Telerik’s current Windows documentation lists Windows 10 version 22H2 or later with the required patch level, Windows 11 x64, and Windows Server 2016 or later, as well as approximately 400 MB or more of free disk space. Its listed service destinations matter in network-restricted environments; validate connectivity before deployment. These requirements are specific to the documented Everywhere release and should not be assumed for Classic.
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Installing Fiddler Everywhere does not necessarily sign users in or activate their account. Users may need to authenticate separately. Fiddler Everywhere’s Enterprise material describes features such as managed configuration, policy-driven deployment and patching, and SSO; do not assume those capabilities are included in every license. See Telerik’s Enterprise overview.
Fiddler is a traffic-capture and proxy-debugging tool, so deployment planning should cover more than the silent command. Decide who may capture traffic, how session files will be handled, whether HTTPS decryption and trusted root certificates are permitted, and whether captured data could include credentials, tokens, personal information, or proprietary content. Also decide whether the app should be Required or Available, whether proxy behavior may be enabled automatically, and which outbound services are allowed by policy.
Recommended baseline for device-wide Fiddler Everywhere
App type: Windows app (Win32)
Install command: FiddlerSetup.exe /S /allusers
Install behavior: System
Detection: verified installed Fiddler executable or validated registration
Assignment: pilot device group firstKeep Classic as a separate package with its documented silent command, FiddlerSetup.exe /S, and verify its scope, installed path, detection, and uninstall behavior against the exact release. The key operational rule is to make the vendor installer’s scope and Intune’s execution context agree, then prove the result with detection and a real pilot deployment.
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