Add your Outlook.com, Microsoft 365, or Exchange-based email account to your iPhone, iPad, or iPod Touch using the iOS Mail app.

Copilot app updates bring a simpler, unified experience for personal, work, and school accounts. Learn what's changing, what's retiring, and how to prepare.

The Microsoft Copilot app is your AI app for work. Copilot connects to the Microsoft 365 apps and content you use every day, creates polished documents, spreadsheets, and presentations, gets things done with Cowork, lets you choose between leading AI models, understands your job and company through Work IQ, and keeps your data protected. When you sign in, your experience adapts to your account ...

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Calendar Instructions in Outlook and Copilot Tip Use people and subject filters to target rules. For example, accept meetings from your manager or follow meetings with the subject “Quarterly Review.” Add the condition “if my calendar is free” when you want to avoid conflicts. Following communicates intent to the organizer without blocking your time. If you previously used the ...

Support for Windows 10 has ended on October 14, 2025. Learn more about your options for Windows 10.

Summary The /INTEGRITYCHECK linker option provides Windows kernel digital signature verification for user mode Portable Executables (PE) files. This linker option is required for anti-malware and anti-cheat scenarios to register components with the Windows Security Center. You must sign IntegrityCheck-linked user mode PEs using Trusted Signing (formerly Azure Code Signing). The cross-signing ...

Introduction Microsoft is updating the Windows code-signing infrastructure to replace expiring certificates (CAs), strengthen signing algorithms, and prepare for post-quantum cryptography (PQC). Some applications might fail when Microsoft signing certificates or algorithms change, even when Windows considers the signed file valid and trusted. Developers and software vendors should review all ...

Learn how to set up your user account for multifactor authentication with Microsoft 365.

解釋如何檢查應用程式或程式是否已安裝。 向我展示如何解釋 iVR_ContactSupport_T1。 向我展示我似乎無法發送反饋或報告的原因。