Windows 10: Change an outlook file association

I accidentally opened an outlook file *** Email address is removed for privacy *** with Adobe acrobat and it changed the file association to open only with acrobat. I have tried to change it back to open with outlook but outlook says it cannot use that file type. How can I change the outlook file now associated with PDF back to an outlook file?

:)

 

Outlook PST File Problem

That is exactly what I was going to suggest. Export everything to another PST file, delete the old(or rather move it out of the default folder) and replace it with the new PST file that you exported.

 

Change file association back to unknown program in Windows 10

Hi,

Thank you for posting in Microsoft Community.

We understand how you feel about the situation. We're sorry for the trouble.

I suggest you to follow the below steps and check if it helps.

1) Create a new file with any extension and save it on any location.

2) Next Open Control Panel (icons view), click/tap on the default programs icon.

3) Click/tap on the Associate a file type or protocol with a program
link.

4) Either double click/tap on the file extension or protocol, or click/tap on the file extension or protocol and click/tap on the
Change Program button of the one you want to change the "current default' program association of.

5) If the program you want to associate is not listed, then click/tap on the
More Options link if available.

6) Click/tap on a listed program that you want to associate.

7) If you associated a program, then you will see this below as "Set Associations" updates and reloads.

8) Once it is done go back to the file which you have created and delete the file.

9) Go to default programs and refresh the set association programs. It should show as other unknown.

Hope this helps. Please reply to us with the status of the issue.

Thanks.

 

Remove (not change) file extension association

I mistakenly associated a file extension with .pdf. I've found many instructions on how to change (swap) the file associate from one extension to the other, but how do you remove the association completely and return it to "Choose a default" ??

This user was very helpful (How to UNSET/REMOVE a default app for file type).

I took the suggested steps above and it removed the association but didn't return it to "Choose a default" ... this has caused a thumbnail app to work for every file EXCEPT the ones i mistakenly associated, then did the work around on. This is affecting
productivity as I'm working with over 1,000 files (and growing). Since 145 people said they had the same question, please Microsoft, can you answer or solve this problem? Please help. Thanks.