Go to File > Info > Protect Document > Encrypt with Password. Type a password, press OK, type it again and press OK to confirm it. Save the file to make sure the password takes effect.

Encryption is the process of converting data into a code to prevent unauthorized access. In Windows, this can be achieved using built-in tools that allow you to encrypt files and folders, …

How to protect an Excel file using a password to prevent unwanted access to your data.

Add password protection to a file Select File > Info. Select Protect Presentation > Encrypt with Password. In the Password box, enter the password you'd like to use. Select OK. PowerPoint …

Send S/MIME or Microsoft Purview encrypted emails in Outlook using a work or school account with a qualified Microsoft 365 subscription.

Depending on what kind of security is needed, someone sending an email from Outlook can encrypt the message, add a digital signature, apply a sensitivity label, or protect the way an …

You cannot open a workbook or document that has been password protected in the Windows-based version of Excel or Word if the password is longer than fifteen characters. If you want to …

If you don’t want others to open your file: You can encrypt the Excel file, which is the most common technique used. This basically means you lock it with a password and nobody except …

Encrypt: Your message stays encrypted and doesn't leave Microsoft 365. Recipients with Outlook.com and Microsoft 365 accounts can download attachments without encryption from …

Encryption is the process of converting data into a code to prevent unauthorized access. In Windows, this can be achieved using built-in tools that allow you to encrypt files and folders, …