Password protect file on Online version of Office 365

[adassist]

Hi there, 
I just started a new position and there are certain documents that I need to set up password protection on as it is sensitive information. However, we only have access to Office 365 online, and do not have desktop apps. I try the File, Info and I do not have protect workbook for example. Any ideas if I am able to do this on the web version of excel?

[#2]

@adassist 

You're out of luck. According to Protect a workbook:

"Excel for the web can open workbooks protected by a password but these files cannot be edited in web. Passwords can’t be added, changed, removed, or recovered from Excel for the web.

If you want to add a password to a workbook you are working on in Excel for the web, and you have Excel desktop application, use the Open in Excel button to open the workbook and password protect the workbook. But going forward, you’ll only be able to view the file on web -- to make changes to the workbook, open it in your desktop version of Excel."