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You are moving from Classic Outlook to the new Outlook for Windows and find that shared contacts folders from delegated mailboxes no longer appear. The new Outlook does not support the automatic display of shared contacts from mailboxes where you have delegate access. This article explains the technical reason for this limitation and provides a … Read more
If you use web add-ins in Outlook, moving from Classic Outlook to the New Outlook changes where you find and manage these tools. Web add-ins are small programs that integrate with Outlook to extend its functionality, such as adding a CRM tool, a project manager, or a grammar checker directly into your email window. In … Read more
When you switch from Classic Outlook to the new Outlook for Windows, the Microsoft Teams Meeting add-in may not appear where you expect it. Classic Outlook displayed the add-in in the ribbon or under meeting invitations. The new Outlook uses a different integration method that does not rely on a traditional add-in. This article explains … Read more
You moved to the new Outlook for Windows and discovered that your third-party account add-ins from classic Outlook are no longer available. These add-ins, such as those for Gmail, Yahoo, or other IMAP providers, were designed for the classic Outlook architecture and do not load in the new Outlook client. This article explains why these … Read more
Classic Outlook users who manage multiple email accounts often rely on add-ins to extend functionality for each mailbox. When switching to the new Outlook, add-ins behave differently for secondary accounts, leaving some users unable to access their tools. This article explains how add-in permissions work in the new Outlook for accounts added after the primary … Read more
After moving from Classic Outlook to the new Outlook for Windows, many users find that their S/MIME certificates no longer work for signing or encrypting emails. This happens because the new app uses a different mail engine and security architecture that does not automatically import certificate settings from the classic version. This article explains how … Read more
When you switch to the new Outlook for Windows, you may notice that sensitivity labels appear differently than in classic Outlook. These labels help you classify and protect email content, but their settings are now managed in a different place. This article explains where to find the sensitivity label settings in the new Outlook and … Read more
Data Loss Prevention or DLP policies in Microsoft 365 help prevent sensitive information from leaving your organization through email. When you switch to New Outlook, DLP rules that worked in classic Outlook may behave differently because the new client uses a different architecture. This article explains how DLP policies apply in New Outlook, how to … Read more
You need to stop users from sending emails in Outlook unless a sensitivity label is applied. This requirement is common in regulated industries where every message must carry a classification such as Confidential or Internal. In classic Outlook, this was handled by a registry key or Group Policy setting. In the new Outlook for Windows, … Read more
You need to prevent recipients from printing a PDF attachment that contains mandatory classification labels. Both New Outlook and Classic Outlook offer Information Rights Management features, but they work differently and have distinct limitations. This article explains the core difference between the two clients regarding PDF printing restrictions, why the feature behaves inconsistently, and the … Read more