Invisible digital signatures in Word, Excel, or PowerPoint. An invisible digital signature, like a visible digital signature line, assures the authenticity, integrity, and origin of a document.

简介. Microsoft .NET Framework 修复工具可检测影响Microsoft .NET Framework 设置或更新的常见问题。 该工具尝试通过应用已知修补程序或通过修复受支持 .NET Framework 版本的损坏安装来解决这些问题。

Learn how to get more storage or delete excess files if your OneDrive is full or near your storage limit.

IMPORTANT This update will not be offered if your Windows Recovery Environment (WinRE) meets any of the following conditions: If the WinRE recovery partition does not have sufficient free space, see the NOTE in the "Summary" section. The note provides instructions about how to increase the available free space in the WinRE recovery partition.

Important Because changing your Microsoft account password is slightly different than resetting a forgotten password, this page does not cover the steps to reset your account password.

Select Review activity to check for any unusual sign-in attempts on the Recent activity page.If you see account activity that you're sure wasn't yours, let us know and we can help secure your account—if it's in the Unusual activity section, you can expand the activity and select This wasn't me.If it's in the Recent activity section, you can expand the activity and select Secure your account.

Email encryption. Outlook.com includes encryption and prevent forwarding features that ensure your confidential and personal information you share via email stays encrypted and doesn’t leave Microsoft 365.

Sign in to microsoft365.com to view your Microsoft 365 work or school account. Sign in. Install and manage your apps. On the Office apps card, select Manage, and select Install to install or reinstall the latest desktop apps, or other apps such as Project or Visio.(An install option is available as long as your admin assigned you a license and gave you permission to self-install.)

If you continue to try, you still can't turn on the Security Center. Resolution. To resolve this problem, make sure that the Security Center service is configured correctly, and then start the Security Center service.

Invite people to view or edit your presentation. Save your file to the cloud and then invite people to view or edit it. That way, whenever you update your file, everyone you share with will have the latest version.