Fix SharePoint External Verification Code Delays and Expiration
Learn how to troubleshoot delayed SharePoint external sharing verification codes, understand the 15-minute expiration limit, and check Microsoft 365 service health.
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 Review Quarantine for a Mail-Enabled Public Folder
Learn how administrators can review quarantine items for mail-enabled public folders in Microsoft Defender and why shared mailboxes offer better delegation.
Read more ›How to Upgrade Office 365 DKIM Selector to a 2048-Bit Key
Learn how to upgrade an Office 365 DKIM selector from a 1024-bit to a 2048-bit key, including instructions for rotating keys and updating external DNS records.
Read more ›How to Fix Data Classification Rules Not Showing Descriptions or Colors
Learn how to troubleshoot Microsoft 365 data classification rules that fail to display descriptions or colors, and verify mobile device compatibility.
Read more ›Which Microsoft License is Required for Data Loss Prevention?
Learn which Microsoft 365 licenses, such as E3 and Business Premium, are required to enable Data Loss Prevention (DLP) for Exchange, SharePoint, and OneDrive.
Read more ›How to Verify if an Email from email2.office.com is a Legitimate Microsoft Message
Learn how to determine if an email from email2.office.com is a genuine Microsoft communication or a spoofed phishing attempt to protect your account.
Read more ›Where to Find Retention Policies in the New Exchange Admin Center
Learn how to find and manage Exchange Online retention policies that have been moved from the new Exchange admin center to the Microsoft Purview compliance portal.
Read more ›Fix "An Organization Is Protecting Its Data" in OneNote iPhone
Learn how to resolve the "An organization is protecting its data" error in OneNote for iPhone by managing work or school account access restrictions.
Read more ›How to Secure Short-Term Contractor Access to SharePoint and Teams
Learn how to securely grant short-term contractors access to Microsoft SharePoint and Teams using Conditional Access, guest accounts, and device compliance.
Read more ›Configure OAuth or OpenID Connect SSO with Microsoft Entra ID
Learn how to configure OAuth 2.0 or OpenID Connect Single Sign-On (SSO) with Microsoft Entra ID, including gathering vendor requirements and app registration.
Read more ›Fix DKE Sensitivity Labels Missing in Subsequent Office Documents
Learn how to troubleshoot Double Key Encryption (DKE) sensitivity labels appearing only in the first Word document and fix error 0x80040217.
Read more ›Why Attack Simulation Assigns Training to Uncompromised Users in Microsoft 365
Discover why Microsoft Defender for Office 365 Attack Simulation assigns unexpected training to uncompromised users and learn how to resolve configuration issues.
Read more ›How to Handle Microsoft Account 30-Day Security Waiting Period
Learn why Microsoft enforces a 30-day waiting period for security information changes and what steps you can take to secure your account from hackers.
Read more ›How to Upgrade Microsoft 365 DKIM Keys from 1024-Bit to 2048-Bit
Learn how to upgrade your Microsoft 365 DKIM keys from 1024-bit to 2048-bit for enhanced email security. Follow our guide to safely update DNS records and rotate keys.
Read more ›How to Temporarily Disable Microsoft Defender Real-Time Protection
Learn the steps to temporarily turn off Microsoft Defender real-time protection in Windows Security, understand the risks, and safely manage antivirus settings.
Read more ›How to Fix Microsoft 365 DKIM Shows None or Fails Validation
Learn how to troubleshoot and fix Microsoft 365 DKIM validation failures or 'none' statuses by inspecting message headers, checking DNS records, and verifying mail gateways.
Read more ›Does a Lenovo Vantage PowerShell Warning Indicate a Login Attempt?
Learn why a Lenovo Vantage PowerShell warning about a missing registry property appears and why it does not indicate a suspicious login attempt on your PC.
Read more ›How to Change Microsoft 365 Authentication Frequency on iPhone and Android
Learn why Microsoft 365 prompts for authentication more frequently on iOS and Android devices, and discover how administrators can adjust session frequency policies.
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