209 questions with Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365 tags

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Microsoft 365 SMTP Authentication Issue Affecting FRP Service Contact Forms and Automated Emails

I am currently managing an FRP-related website that provides Android FRP bypass information and remote unlocking support. Recently, after migrating our email services to Microsoft 365, we started facing issues with SMTP authentication and outbound email…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-05-15T16:07:13.9433333+00:00
Julie Sam 0 Reputation points
answered 2026-05-15T16:07:48.0366667+00:00
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2 answers

Suspicious email sending patterns detected

Hello Team, I am having problems with the company emails. A medium-severity alert has been triggered ⚠ Suspicious email sending patterns detected Severity: ● Medium Time: 5/14/2026 Activity: Suspicious outbound email activity

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-05-14T15:12:31.1133333+00:00
Jorge Fernandez 0 Reputation points
answered 2026-05-14T15:15:27.2333333+00:00
Jorge Fernandez 0 Reputation points
0 answers

InvalidApplicationId error from /telemetry/info endpoint

I'm making a call to https://partnersfrontend-eus-prd.trafficmanager.net/telemetry/info to fetch the ServiceUri that I need to push security events to defender. The call gives this error: HTTP/1.1 401 Unauthorized Date: Fri, 17 Apr 2026 05:49:45…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-17T06:14:23.7366667+00:00
Chaitanya Kummaragunta 0 Reputation points
commented 2026-05-14T04:10:45.14+00:00
Chaitanya Kummaragunta 0 Reputation points
1 answer

Is this the real CDOC email

My original Microsoft account was hacked a couple of days ago. The worst part is that when the hacker logged into my account, they deleted my linked email address and linked their own, so when I try to use something like [ https://account.live.com/acsr]…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-05-13T11:03:07.1766667+00:00
ntskkstar 0 Reputation points
answered 2026-05-13T11:04:08.6566667+00:00
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1 answer

locking device

i want to use my face and fingerprint to unlock my laptop but if i try to add this things it does not allowing me i dont know what going on i wish you could give me an idea how can i add it to my laptop

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-05-12T09:37:12.2366667+00:00
Mhlengi Gumede 0 Reputation points
answered 2026-05-12T09:37:32.2866667+00:00
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9 answers

Trojan:Win32/Cerdigent.A!dha

  I have subject warning appearing (see image below).   How do I get rid of it?   Thanks in advance for any replies.

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-05-05T10:49:59.42+00:00
triptotokyo-5840 36,686 Reputation points Volunteer Moderator
commented 2026-05-11T09:51:31.6366667+00:00
Gérard Oomens 122.3K Reputation points Volunteer Moderator
1 answer

Unable to disable quarantine notifications

Microsoft continues to send quarantine notifications to our end users regarding phish and spam messages, despite our best attempts. The steps I've taken: Both Standard and Strict Protection have been disabled Under Threat Policies > Anti-Phishing,…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-05-05T14:53:40.04+00:00
CL 0 Reputation points
answered 2026-05-05T14:57:30.5066667+00:00
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1 answer

Open SSL Vulnerability libcrypto-3-x64.dll and libssl-3-x64.dll

Experiencing issues with OpenSSL vulnerabilities affecting organization security score. So far, I was not able to find any fix for it, tried updating the programs, doing windows updates even take ownership of the program file and delete manually. but the…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-03-18T16:50:17.11+00:00
alex kalapnauth 25 Reputation points
commented 2026-04-30T00:51:38.3166667+00:00
Mack Swift 5 Reputation points
2 answers One of the answers was accepted by the question author.

how to add trusted domains

Hi All, One of our users is experiencing link redirection in Microsoft Teams through Microsoft Defender for Office 365. When the user clicks a link in Teams, it is routed through the “Verifying link” page before opening. We have a few trusted domains,…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-13T23:51:43.8933333+00:00
Roger Roger 7,631 Reputation points
accepted 2026-04-24T11:59:09.37+00:00
Roger Roger 7,631 Reputation points
0 answers

How to allow the files

Hi All, I have a couple of scenarios where files stored in SharePoint Online sites are being flagged as threats by Microsoft Defender for Office 365. These files are legitimate, and I would like guidance on how to review and allow them. File name:…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-24T11:55:55.73+00:00
Roger Roger 7,631 Reputation points
edited the question 2026-04-24T11:56:27.2533333+00:00
Roger Roger 7,631 Reputation points
1 answer

False Positive Dispute – Domain Owner Request for Review – scnv.io

Dear Microsoft Defender SmartScreen Team, I am writing on behalf of Scanova, the owner and operator of the domain scnv.io, to formally dispute its classification as a malicious website by Microsoft Defender SmartScreen. We have recently been informed by…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-17T13:13:07.32+00:00
Amit Bisht 0 Reputation points
answered 2026-04-17T13:13:30.99+00:00
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1 answer

Can admins with E5/Defender P2 licenses purge phishing emails from E3‑licensed mailboxes using Threat Explorer?

Good evening, Our company recently downgraded most users from Microsoft 365 E5 Security to Microsoft 365 E3. Before the downgrade, we used Threat Explorer to identify and purge phishing emails from user mailboxes. After the downgrade, we lost access to…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-17T00:26:32.06+00:00
Puri7y 45 Reputation points
answered 2026-04-17T00:26:45.0833333+00:00
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1 answer One of the answers was accepted by the question author.

How to Modify Attack Simulation Training Malware Attatchment DOCX File

In the attack simulation training content library, you can select malware attachment techniques to use as your payload. Everything is normally modifiable such as email information, email content, themes and what not, etc. but what I can not find is how…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-08T16:18:36.4766667+00:00
Nicholas Johnson 20 Reputation points
accepted 2026-04-13T17:57:07.7166667+00:00
Nicholas Johnson 20 Reputation points
2 answers

Trojan:MSIL/AMSIBypass.KK!MTB

I have this malware appearing on my computer and would like to understand the best steps to remove it.

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-03T16:04:31.4833333+00:00
Mike and Kelly Bonte 0 Reputation points
answered 2026-04-12T17:25:59.8333333+00:00
Mike and Kelly Bonte 0 Reputation points
1 answer

Initiating Web Protection on my Samsung S-25 android cellphone?

I just purchased a Dell computer with Windows 11 and I have a Windows Office 365 Personal subscription. I tried to download Windows Defender on my Samsung S-25 android cellphone and it won't let me allow accessibility permissions to complete the phone…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-08T21:03:18.9+00:00
Allen Bergseth 0 Reputation points
answered 2026-04-08T21:03:31.62+00:00
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1 answer

Quarantine email notifications filling up inbox

Recently my inbox started getting Quarantine notifications in place of spam and has started to fill up my inbox like spam did. The pathway inside the spam email has a lot clicks, loads external pages and is overall a time killer. It's potentially worse…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-06T17:13:07.1166667+00:00
Chris Griffin 0 Reputation points
answered 2026-04-06T17:13:28.3533333+00:00
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1 answer

Microsoft Defender O365 incorrectly classifying trusted sender as High Confidence Phish

Hello everyone, I’m experiencing an issue with Microsoft Defender for Office 365 incorrectly flagging a legitimate email as “High confidence phish” The sender (pac@aludra.cloud) is trusted and has already been validated. However, multiple emails with…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-06T14:54:03.0533333+00:00
Jose Flores 0 Reputation points
answered 2026-04-06T14:54:21.7033333+00:00
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0 answers

Temporarily deactivate VPN

I need to termporarily inactivate the VPN but don't know how to do so. I am trying now on my laptop with Microsoft 365, windows 11 but don't know where to find it. On my iphone when I try to inactivate it in Microsoft defender, it immediately turns it…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2025-10-23T16:36:55.64+00:00
Ruth 5 Reputation points
commented 2026-04-06T03:17:30.5466667+00:00
Hisham Madi 0 Reputation points
0 answers

Virtual and threat protection not working

I tried working Quarts for academics It worked fine but all of a sudden it doesnt load. I tried reinstalling it didnt work, Then it showed if windows security doesnt then pops this error and my windows security is stuck with blackscreen I don't…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-04-04T21:58:50.5133333+00:00
Sahithi pavani Vejju 0 Reputation points
1 answer

My SS # is wrong in Defender and I can't access it

I received a notice from Defender that I needed to check due to a problem. I tried earlier and answered the questions and said something was wrong and I had to wait so many hours. I tried again to today and added a recovery pin and once again I could…

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
asked 2026-03-31T19:14:09.7433333+00:00
Sandra Tunnell 0 Reputation points
answered 2026-04-04T12:51:16.33+00:00
kagiyama yutaka 2,590 Reputation points