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    We have currently a restricted terminal servers infrastructure in W2008R2 where we perform white listing for applications that are allowed to run. This means that for exemple, when a user logs in on the terminal servers infrastructure and some software tries to run at the login of the user, such as the anti-virus tray,which tries to start in minimize in the right bottom corner just next to the clock, it is denied and we end up with an event for SoftwareRestrictionPolicies, which is totally fine.

    Since 2008 is coming to an end, we are busy migrating to Windows 2016 terminal servers but we face a problem where the end user receives a message when an application is blocked at login:

    I've spent some time on internet trying to find a way to hide that message, but no luck. I also tried to disable those applications at login but they start in various way and I am unable to disable all of them.

    Does someone have an idea on how to improve the end user experience ?

    Thank you.

    Thursday, March 21, 2019 8:25 AM

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    Hello Jordan,

    Please check the following links for more information, hope they'll help you.

    https://www.windowscentral.com/how-fix-app-has-been-blocked-your-protection-windows-10

    https://community.spiceworks.com/topic/2134243-windows-10-this-app-has-been-blocked-by-your-system-administrator

    Mark it as answer if your question has solved. MCT Regional Lead. x2 MCSE-MCSA Exchange Server & Windows Server

    Thursday, March 21, 2019 11:16 AM
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    Hi,

    The issue could caused by Applocker blocking the program.
    Please check the setting of Applocker in GPO: Computer Configuration\Policies\Windows Settings\Security Settings\Application Control Policies.

    Besides, you could try to set UAC to the lowest and check the symptom.

    Here is a thread for your reference: https://superuser.com/questions/929945/how-to-bypass-this-app-has-been-blocked-for-your-protection-error

    Note: This is a third-party link and we do not have any guarantees on this website. This is just for your convenience. And Microsoft does not make any guarantees about the content.

    Best regards,

    Yilia 

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Friday, March 22, 2019 7:07 AM
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    Dears,

    We indeed use an Application Control Policy and the purpose is to keep it that way. So those applications need to remain blocked, I'd just like to get rid of that error message prompt.

    Tuesday, March 26, 2019 2:18 PM
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    Hi,

    You could follow the below blog to bypass the message: 

    https://blog.pcrisk.com/windows/12622-an-administrator-has-blocked-you-from-running-this-app

    Note: This is a third-party link and we do not have any guarantees on this website. This is just for your convenience. And Microsoft does not make any guarantees about the content.

    Best regards,

    Yilia 

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Wednesday, March 27, 2019 8:55 AM
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    Hello Yilia,

    That page deals of the following topic:

    1. Disable Windows SmartScreen Feature

    This feature is nowhere to be found on our Windows Server 2016

    2. Blocked files

    The purpose is to keep it blocked

    3. Run The File Using Command Prompt, Use Hidden Administrative Account, Check Your AntivirusThat's not the purpose here

    Wednesday, March 27, 2019 10:31 AM
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    Hi,

    Try to turn the notifications off: 

    Settings> System> Notifications& Actions> Get notifications from apps and other senders

    Best regards,

    Yilia 

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Friday, March 29, 2019 8:28 AM
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    Hello,

    Unfortunately it doesn't help, I still receive that blue pop-up.

    Friday, March 29, 2019 1:36 PM