Why does the Microsoft online service need to convert some Office files?

To continue working with certain Office files in this version of Office, Microsoft first needs to convert them to a different format using our online service. To do this, we send certain types of files (shown in the table below) over to a secure Microsoft service over the internet for conversion. The converted file is then sent back to your device immediately. The Microsoft online service doesn't store any of your file content on our servers. You can save the converted file and edit it in Office even when you're offline.

Converting the document to a different format helps you get the most up-to-date features and security functionality across all your devices. More specifically, the files are converted so you can do the following:

The Microsoft online service is used to:

Office Mobile for Windows 10

Office for Android

Office for Mac

Office for iOS

Open and edit Excel and PowerPoint binary files (.xls, .ppt) as Microsoft OOXML files (.xlsx, .pptx).

Yes

Yes

No

Yes

Open and edit OpenDocument Format files (.odt, .ods, .odp) as Microsoft OOXML files (.docx, .xlsx, .pptx).

Yes

Yes

Yes

Yes

Open and edit Comma Separated Value (.csv) files in Excel as Microsoft OOXML files (.xlsx).

Yes

Yes

No

Yes

Open PowerPoint OOXML files (.pptx) that have legacy objects, no longer supported in this version of Office.

Yes

Yes

No

Yes

Open and edit Rich Text Format files (.rtf) as Microsoft OOXML files (.docx).

Yes

Yes

No

Yes

Print Excel and PowerPoint files.

Yes

Yes

No

Yes

Export Word, Excel, and PowerPoint files as OpenDocument Format files (.odt, .ods, .odp)

Yes

Yes

Yes

Yes

Export Word files as tagged PDF (.pdf)

No

No

Yes

No

As mentioned earlier, the Microsoft online service doesn't store any of your file content on our servers. You can read the Privacy Statement for more information. In some very rare scenarios, the converted file might not contain some data that is incompatible with the new version of Office, but the original file is always kept intact and untouched.

To turn off this service

  • On Office Mobile for Windows 10, go to File > Settings > Trust Center and turn the Use Microsoft online service toggle to Off.

  • On Office for Android, go to File > Settings > Trust Center and turn the Use Microsoft online service toggle to Off.

  • On Office 2016 for Mac, go to Preferences > Security and Privacy, and then uncheck the box next to Use Microsoft online service to open certain files.

  • On Office for iOS, go to your system Settings app, select the Office app you're using (for example, if you're using PowerPoint, select PowerPoint), and under privacy, turn off the toggle next to Use Microsoft online service.

See Also

Microsoft Privacy Statement

Expand your skills
Explore training
Get new features first
Join Office Insiders

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.

×