What is a .OLK15MSGATTACH File And How To Open It – Microsoft (Guide)

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While downloading files, you might have downloaded a file with the .olk15msgattach extension. You most likely know what the file is, but you might be unsure on how to open it. In this article we will explain what .olk15msgattach file extension is, how to open it and how to work with it.

What is a .OLK15MSGATTACH file?

The .OLK15MSGATTACH file extension comes from Outlook 2016 Email Message Attachment File. The creator of this file extension is Microsoft. The file is a data related file.

What to know

There is currently 1 software that can open the .olk15msgattach file on 1 platform.

How to open a .OLK15MSGATTACH file?

Below we will show you a step-by-step guide on how to open the .OLK15MSGATTACH file on various operating systems.

How to open a .OLK15MSGATTACH file on Mac

The .olk15msgattach file can be opened in 4 steps on Mac.

1. The first step is to download the Microsoft Outlook 365 software. You will be using this software in order to open the file. The other software that you can use is Microsoft Outlook 365.

Step 2

Step 2: Finding your .OLK15MSGATTACH file

2. In the second step you need to locate the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Clicking “Open with”

3. In the third step, after locating your file, right click on it and click “Open with”.

Step 4

Step 4: Choosing the software to open your file

4. In the fourth step, after clicking “Open with”, you should see the Microsoft Outlook 365 software that you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Mac.

Still cannot open the .OLK15MSGATTACH file?

If you cannot open the .OLK15MSGATTACH file, it is entirely possible that you are trying to open the wrong file. There are many similar file extensions that look like the .OLK15MSGATTACH file.oll – inData, .olm – Microsoft, .olp – Microsoft, .olt – Orbit Downloader, .oma – Sony. You might be trying to open the wrong file, please recheck if you are trying to open the right file extension again.


In this article you have learned how to open the .OLK15MSGATTACH file with the Microsoft Outlook 365 program on Mac.