## Issue #50013 ## Description The Microsoft compliance proxy controller (`website/api/controllers/microsoft-proxy/receive-redirect-from-microsoft.js`) called `JSON.parse` on response bodies from Microsoft's Partner Compliance and Graph APIs without checking for empty bodies or unexpected response shapes. When Microsoft returned an unexpected response — for example, a 2xx status with an empty body, which can happen on partial-setup tenant states or when API permissions on the enterprise app haven't been fully consented — the controller threw a raw `SyntaxError: Unexpected end of JSON input` that surfaced verbatim in the Fleet UI as the `setup_error` string, giving admins a Node.js stack trace instead of a useful message. Changes: - Added explicit empty-body checks before `JSON.parse` at both API-response parse sites, with a friendly `setup_error` message pointing at the likely causes (partial setup / missing API permissions). - On parse failure, expanded the diagnostic log to include response status code, body length, and a 200-char body snippet so we can diagnose future occurrences from server logs instead of asking admins to reproduce. - Added defensive checks on `parsedPoliciesResponse.value` and `parsedGroupResponse.value` before indexing — previously `parsedPoliciesResponse.value[0].Id` would throw `TypeError` if Microsoft returned a well-formed response missing the expected shape. **Note for reviewers:** The new `sails.log.warn` calls interpolate the runtime tenant ID (`informationAboutThisTenant.entraTenantId`) — same pattern as the existing log at line 209 that logs `fleetInstanceUrl`. Heroku logs will contain tenant IDs when these error paths fire, which is intentional so infra can grep by tenant when triaging. If we'd rather rely on request-correlation IDs and keep tenant IDs out of logs, happy to make that a follow-up. ## Screenrecording ## Testing - [ ] Sanity-checked locally by inducing an empty response body - [ ] Verified no changes to the happy-path flow - [ ] Verified existing setup_error strings that the Fleet UI checks for (admin-did-not-consent, missing-conditional-access-group) are unchanged <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Bug Fixes** * Improved Microsoft integration setup handling when API responses are empty, invalid, or missing expected data. * Added clearer setup error messages for missing policies or the “Fleet conditional access” group. * Enhanced diagnostics to help identify response-related setup failures. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Open-source platform for IT and security teams with thousands of computers. Designed for APIs, GitOps, webhooks, YAML, and humans.
What's it for?
Fleet gives you a single system to secure and maintain all your computing devices over the air. You can do MDM, patch stuff, deploy software, and verify anything, all from one place, across every OS your organization uses.
Fleet works directly with data and events from the native operating system, down to the bare metal. Strong diagnostics let you investigate errors on end-user devices and collect accurate audit evidence in minutes.
Get started
You can try Fleet out for yourself, or grab time with one of the maintainers to chat.
Is it any good?
Fleet is used in production by IT and security teams managing thousands of devices. Many deployments support tens of thousands of hosts, and a few large organizations manage 400,000 or more.
Supported platforms
- Linux (all distros)
- macOS
- Windows
- Chromebooks
- iOS and Android (BYOD or corporate-owned)
- Amazon Web Services (AWS)
- Google Cloud (GCP)
- Azure (Microsoft cloud)
- Data centers
- Containers (kube, etc)
- Linux-based IoT devices
Infrastructure as code
Manage your fleet with GitOps, or use the GUI, REST API, webhook events, and the fleetctl command-line tool.
Linux support
First-class support for all major distros. Linux gets the same attention and visibility as macOS and Windows.
Visibility and compliance
Fleet can report on hundreds of attributes across your devices and ships with CIS benchmarks for macOS and Windows and comprehensive operating system, hardware, and software data. Check out the table reference documentation to see what's available.
Open by design
Fleet is open source and transparent about what it can and can't see. End users can verify exactly how the agent works and what data their company collects. Fleet collects only the data needed to manage and secure devices, not private activity like keystrokes, emails, or webcams.
Good neighbors
Ready-to-use, enterprise-friendly integrations exist for Snowflake, Splunk, GitHub Actions, Vanta, Elastic Jira, Zendesk, and more. Fleet also works with tools such as Munki, Chef, Puppet, Ansible, CrowdStrike, and SentinelOne.
Lighter than air
Fleet is lightweight and modular. You can use it for MDM without using it for security, and vice versa. You can turn off features you are not using.
Free as in free
The free version of Fleet will always be free. Fleet is independently backed and actively maintained with the help of many amazing contributors.
Longevity
The company behind Fleet is founded (and majority-owned) by true believers in open source. The company's business model is influenced by GitLab (NYSE: GTLB), with great investors, happy customers, and the capacity to become profitable at any time.
Fleet Device Management's company handbook is public and open source. You can read about the history of Fleet and our commitment to improving the product.
Chat
The Fleet community is full of kind and helpful people. Whether or not you are a paying customer, if you need help, just reach out.
Contributing
Contributions are welcome, whether you answer questions on Slack / GitHub / LinkedIn, improve the documentation or website, write a tutorial, give a talk at a conference or local meetup, give an interview on a podcast, troubleshoot reported issues, or submit a patch. The Fleet code of conduct is on GitHub.
License
The free version of Fleet is available under the MIT license. The commercial license is also designed to allow contributions to paid features for users whose employment agreements allow them to contribute to open source projects. (See LICENSE.md for details.)
Fleet is built on osquery, nanoMDM, Nudge, and swiftDialog.