Hi @Patrick Ldierts,
Thank you for posting in this community.
I know how you feel, sometimes we do wish that when we click on files in Share Point Online or OneDrive Online they automatically open in the local client.
The methods mentioned in your question do work (these are documented in the official documentation), but there may be some parts that are missing that make it not work. Don't worry, try the method below to see if it works:
For SharePoint Online:
- Activate the “Open Documents in Client Applications by Default” feature. This action requires that you use the administrator account for the current site collection or that you have the Full Control permission level for the current site collection. a. Navigate to the target site first. b. Click the gear icon in the upper-right corner. c. Select site information from the list. On the next screen, click the “View all site settings” link. d. Click site collection features link. Then, activate the “Open Documents in Client Applications by Default” feature. This will ensure that Office files stored in SharePoint open in the desktop app, never in Office Online apps.
- Since I am not sure what browser you are using, it is likely that your browser is blocking your request to open the file in the local client. Therefore, I recommend that you use Microsoft Edge to access SharePoint Online. If that is Microsoft Edge you are using, then please clear your browser cache and then see if the problem is resolved.
For OneDrive Online:
- Activate the “Open Documents in Client Applications by Default” feature.
- Navigate to the target site first.
- Click the gear icon in the upper-right corner. Click OneDrive settings link.
- More settings >Site collection features.
- Activate the “Open Documents in Client Applications by Default” feature.
- Try using Microsoft Edge to access OneDrive Online.
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