Why You Receive Unexpected Microsoft Account Single-Use Codes
Learn why you keep receiving unexpected Microsoft account single-use security codes, what it means for your account security, and how to protect your data.
Read more ›Security Issues
Clear security blocks in Office—Protected View, macros, Trusted Center, and unsafe document warnings—safely.
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2215 ResourcesHow to Verify a Suspicious Microsoft Planner Purchase Email
Received a suspicious email claiming a $360 charge for Microsoft Planner Plan 1? Learn how to safely verify the message and protect your account from phishing scams.
Read more ›How to Use Intune to Block Microsoft 365 Apps on Personal Devices Except Teams
Learn how to configure Microsoft Intune and Conditional Access to block Outlook, OneDrive, and SharePoint on personal devices while allowing Microsoft Teams.
Read more ›How to Stop the Certificate Selection Dialog in Excel Add-ins
Learn how to prevent the recurring Select a certificate for Authentication dialog in React-based Excel add-ins using OAuth 2.0, SSO, or Group Policy.
Read more ›How to Check if Microsoft 365 Files Were Accessed After a Blocked Sign-In
Wondering if a blocked sign-in attempt accessed your Microsoft 365 documents? Learn how to interpret file access timestamps and secure your account.
Read more ›How to Troubleshoot Legacy SMTP AUTH on Port 587 with TLS
Learn how to troubleshoot legacy SMTP AUTH failures over port 587 with TLS. Discover how to resolve risky sign-in blocks using Microsoft Entra ID policies.
Read more ›How to Generate OneDrive Audit Logs: Admin Guide
Learn how administrators can generate and review OneDrive audit logs using the Microsoft Purview portal to track file access, sharing, downloads, and deletions.
Read more ›How to Set Microsoft 365 MFA Sign-In Frequency Beyond 90 Days
Learn how to bypass the 90-day limit on the legacy Microsoft Entra MFA page and configure longer sign-in frequencies using Conditional Access policies.
Read more ›How to Check Whether a Microsoft Account Has Been Hacked
Received a suspicious email claiming your Microsoft or Hotmail account is hacked? Learn how to verify your account security, check sign-in activity, and spot spoofed emails.
Read more ›What to Do About a Blackmail Email Sent From Your Own Address
Learn what to do when you receive a Bitcoin extortion email that appears to come from your own address. Secure your account, preserve headers, and prevent fraud.
Read more ›Fix AADSTS54000 Legal Age Group Requirement Errors in Microsoft
Learn how to resolve the AADSTS54000 legal age group requirement error in Microsoft Entra ID that prevents students from accessing essential school applications.
Read more ›How to Restrict the Microsoft Defender Menu During Phishing Training
Learn how to manage and restrict Microsoft Defender navigation menus like Threat Intelligence and Settings during attack simulation and phishing training.
Read more ›How to Identify and Report a Microsoft Copilot Phishing Scam
Learn how to spot and report unexpected Microsoft Copilot phishing scams. Secure your Microsoft 365 tenant against account abuse and compromised credentials.
Read more ›Fix Microsoft Purview Not Applying DLP Policies to On-Premises File Servers
Learn how to resolve issues where Microsoft Purview discovers files on an on-premises share but fails to apply DLP policies by correctly registering the data source.
Read more ›How to Fix Unrequested Microsoft Password Reset Codes
Keep receiving unrequested password reset codes? Learn why this happens and how to secure your Microsoft account against unauthorized access.
Read more ›How to Renew an Expiring SharePoint Add-In Client Secret
Learn how to renew an expiring SharePoint Add-In client secret before it expires. Discover support timelines and developer resources for SharePoint add-ins.
Read more ›How to Find SharePoint Online System Validation Documentation
Learn how to locate Microsoft's security, compliance, audit, and validation documentation for SharePoint Online using the Microsoft Trust Center and Service Trust Portal.
Read more ›How to Fix a Missing Recommended Action in Microsoft Defender
Learn how to troubleshoot and fix a missing recommended action in Microsoft Defender. Discover how to reset Windows Security and check protection history.
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