Error message Powerpoint: file format does not match file extension

Article
2016-07-24

Question

_{Sunday, July 24, 2016 11:34 AM}

Hi,

I want to open a powerpoint that was sent to me by a colleague.

The following error message appears: Powerpoint can't open this file because its file extension has changed. Make sure the format of the file matches the file extension.

I work with Office 365 ProPlus. I tried saving the file putting pptx behind the name (still doesn't open). And ppt (it does open but the original format is gone).

Would be great if any of you could let me know what is going on and how I can fix it. Thanks.

All replies (4)

_{Monday, July 25, 2016 6:46 AM ✅Answered}

Hi,

It looks like you were opening the PowerPoint file from your local drive, correct? Does this issue continues if we try to open the PowerPoint file from the email?

We may also try to start PowerPoint program first and then open this PowerPoint file via File > Open > Browse.

In addition, if possible, it's better to have your colleague to search for this email in his/her Sent Items folder and then forward the email to you again.

Regards,

Steve Fan
TechNet Community Support

Please mark the reply as an answer if you find it is helpful.

If you have feedback for TechNet Support, contact [email protected].

_{Monday, July 25, 2016 4:59 AM}

Hi Esther,

Is it macro enabled presentation (.pptm)?

_{Monday, July 25, 2016 8:31 AM}

Thank you both.

I asked my colleague to send it again and now it works.

It was no pptm, but a pptx. She said others had the same issue.

Thanks though! Great to know this forum works well and quite. :)

Regards, Esther

_{Monday, July 25, 2016 8:35 AM}

Glad to hear that the problem got resolved!! Thank you for letting us know that!