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jaybird283-2674 avatar image
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jaybird283-2674 asked jaybird283-2674 commented

MCM OSD Default Apps Reset

When deploying Windows 10 20H2 (Bare metal) using a MCM Task Sequence (default VL Media, no custom image) the default apps import seems to be getting ignored or reset. in fact i see a few errors about "Default Browser was reset" and other "default apps were reset" messages.

I am pretty sure this is a bug in the semi annual channel version of windows 10 because i can copy the task sequence and have it deploy LTSC 2019 and it works fine.... but i was wondering if anyone has had to deal with this or found a fix. it's the only thing holding me up from moving to MCM for OSD.

and Just an FYI, the process i am using to set the default apps is as follows.

  1. Deploy the OS to a machine

  2. Set the Default Apps Manually

  3. Dism /Online /Export-DefaultAppAssociations:"defaultapps.xml"

  4. Create a package that contains the xml and an importdefaultapps.cmd with the following command line in that script. Dism.exe /online /Import-DefaultAppAssociations:%~dp0Defaultapps.xml

  5. Add a Run Command line step to the end of the task sequence that calls SetDefaultApps.cmd and references the package.

Really all i am changing is adobe stuff and the default mail app to be outlook.

and again this task sequence works fine when i deploy LTSC 2019.



windows-10-generalwindows-10-setupmem-cm-osd
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Adding Windows 10 tags as this issue isn't specific to ConfigMgr and is based on Windows 10 behavior(s).

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1 Answer

Amandayou-MSFT avatar image
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Amandayou-MSFT answered jaybird283-2674 commented

Hi @jaybird283-2674,

I am pretty sure this is a bug in the semi annual channel version of windows 10 because i can copy the task sequence and have it deploy LTSC 2019 and it works fine....

Could we know the issue is on the side of Windows 10 20H2 or the semi annual channel version of windows 10?
If it is on windows 10, I test it and we could refer to this article: https://systemcenterdudes.com/sccm-windows-10-customization/
Note: This is non-official Microsoft article just for your reference.



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I have only tested 20H2 but Win10 SAC has a history of resetting defaults going back a few versions of Win10. so i am only assuming it's still an issue that hasn't been resolved. but i wanted to share a screenshot with you. i think the import of the xml using DISM is working ok but Windows is just confused. because i am seeing conflicting information. As you can see in the screenshots. "Mail" is set as the default app for .mailto files. but when i run dism /online /GetDefaultAppAssociations then it says outlook is the default. if i create a file with a .mailto extension then it thinks there is no app associated. strange stuff...

79704-defaultapps.png


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defaultapps.png (270.2 KiB)