topic Microsoft Defender Blocking an iframe in Dynatrace in Open Q&A

Microsoft Defender Blocking an iframe in Dynatrace

rgarzon1 — Fri, 30 May 2025 07:05:56 GMT

Hello everyone, I am facing an issue with Dynatrace in the many environments (i just tested at least 10 of my enviroments) and Microsoft Defender is blocking an iframe with the source https://{environmentid}.apps.dynatrace.com/ui/apps/dynatrace.classic.hosts, flagging it as malware.

Error Message from DevTools Console: "An iframe on this page was blocked by Microsoft Defender (Malware)."

Browser: Edge - Versión 136.0.3240.92 (Compilación oficial) (64 bits)

this is no happening in Chrome, Brave, Firefox. just in Edge i just validate with some friends and its happening only in edge.

i will notify this as secure but still its a little bit strange

Re: Microsoft Defender Blocking an iframe in Dynatrace

MaciejNeumann — Fri, 30 May 2025 07:27:00 GMT

Hello @rgarzon1,

We've tried to reproduce the behavior with the dynatrace.classic.hosts app using Edge as a browser, but we can't replicate the issue that you've described.

Could you check back with the IT department / MS Defender admins at your organization, why Defender itself identifies the resource as potentially malicious?

Re: Microsoft Defender Blocking an iframe in Dynatrace

rgarzon1 — Fri, 30 May 2025 15:30:32 GMT

Hi @MaciejNeumann

This is not happening in all tenants, i have like 30 distinct tenants and have this behaviour in 2 of them. you can check this ticket 486876 for info related to this. but its not in all tenants, i just posted here trying to find more answers 😅

Re: Microsoft Defender Blocking an iframe in Dynatrace

GosiaMurawska — Tue, 30 Dec 2025 16:11:15 GMT

Hi @rgarzon1! Any updates on this? 🙂

Re: Microsoft Defender Blocking an iframe in Dynatrace

rgarzon1 — Wed, 07 Jan 2026 08:36:40 GMT

Not at all. This happens randomly on some new tenants. Over the past year, there have been almost five tenants with this behavior (some POCs), and nothing happens even if you notify Microsoft that it is not a scam site