Fix "Additional Authentication Is Required" in Microsoft Teams on iOS
Learn how to resolve the "Additional Authentication Is Required" error in Microsoft Teams on iOS by configuring MFA or contacting your IT administrator.
Read more ›Security Issues
Clear security blocks in Office—Protected View, macros, Trusted Center, and unsafe document warnings—safely.
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2215 ResourcesDo App Passwords Expire When Your Office 365 Password Changes?
Learn whether Microsoft 365 or Entra ID app passwords expire after changing your primary account password, and how to securely revoke them.
Read more ›Stop Microsoft Teams Recordings From Deleting After 120 Days
Learn how to stop Microsoft Teams recordings from being automatically deleted after 120 days by configuring Microsoft Purview and Teams retention policies.
Read more ›How to Hide Excel Worksheets from Specific Users Securely
Learn how to hide Excel worksheets from specific users. Discover why VBA is only a deterrent and how to use separate workbooks for true data security.
Read more ›Fix Unusual Microsoft Sign-In with Correct IP but Unknown Browser
Learn what to do when you receive an unusual Microsoft sign-in alert showing your correct IP address but an unfamiliar browser or device while traveling.
Read more ›Fix Microsoft Defender Web Protection Blocking SpectrumTV on iOS
Learn how to troubleshoot and fix the issue where Microsoft Defender Web Protection blocks the SpectrumTV app on your iPhone or iPad.
Read more ›How to Fix Windows Defender Security Center Phone Scam Pop-Up
Encountered a fake Windows Defender Security Center phone scam pop-up? Learn how to safely close the fraudulent browser alert and secure your computer.
Read more ›How to Audit When Exchange Online Mailbox Permissions Were Granted
Learn how to audit Exchange Online mailbox permission changes, including Full Access and Send As rights, using PowerShell and Microsoft audit logs.
Read more ›How to Fix Workday Access Denied or Blocked by Organization
Learn how to resolve Workday access denied issues caused by organizational Microsoft account policies, inactive credentials, or conditional access blocks.
Read more ›Are Start Daily Emails from email2.microsoft.com Official and Safe?
Wondering if Start Daily emails from email2.microsoft.com are official? Learn about the Microsoft Start News Network and if it is safe to unsubscribe.
Read more ›How to Protect Your Microsoft Account After Failed Login Attempts
Learn how to secure your Microsoft account after suspicious login alerts. Follow our step-by-step guide to review recent activity, change passwords, and enable 2FA.
Read more ›How to Recover Microsoft 365 When All Admins Lose Permissions
Learn how to restore access to your Microsoft 365 tenant when all administrators lose permissions. Find step-by-step phone and trial tenant recovery methods.
Read more ›Should You Disable Microsoft Defender When Transferring Files to Mac?
Learn whether it is safe to disable Microsoft Defender when transferring files from a Windows PC to a Mac. Discover best practices for secure data migration.
Read more ›How to Fix Microsoft Defender Error When Blocking a Quarantined Sender
Encountering an incorrect email address error when trying to block a quarantined phishing sender in Microsoft Defender? Learn how to troubleshoot using message traces and support requests.
Read more ›How to Identify and Report Microsoft 365 University Phishing Scams
Learn how to spot Microsoft 365 University login verification phishing emails. Find out what to do if you receive urgent messages demanding your password to secure your account.
Read more ›How to Handle Windows Security Warnings for Local MP3 Hyperlinks in Office
Learn why Microsoft Office displays virus warnings when clicking local MP3 hyperlinks and discover the safest ways to handle these security prompts.
Read more ›How to Fix Microsoft Defender Tunnel Not Starting in Intune
Learn how to troubleshoot and fix Microsoft Defender Tunnel not starting in Intune by checking configuration profiles, device compliance, and certificates.
Read more ›How to Bypass Spam Filtering with an Exchange Mail Flow Rule
Learn how to bypass spam filtering and allowlist sender domains in Microsoft 365 by creating an Exchange mail flow rule and setting the SCL to -1.
Read more ›Try what you just learned
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