Jump to content
  • 0

Users are prompted to specify Internet browser when you click on a link in Outlook 2016

Brian Mooney1709157652


I have having an issue with a brand new Citrix XenApp 7.6 environment where users are prompted to specify Internet browser when clicking on a link in Outlook 2016 emails. I have Google Chrome, Mozilla FireFox, and IE all installed on the golden image and hence are available to the users. I am quite sure that I have IE set as the default browser both by GPO and by setting it manually as the default program. It looks like the IE GPO's stop at version 9 for compatibility.



This is exactly what I get every time but the list shows all the available browsers.





The closest alternative I have found is as follows but really? Have to create a custom XML file?





Is this the only way? Has anyone else ran into this issue?


Windows 8+ no longer allow these settings to be changed via registry to prevent applications from hijacking preferences. You now have to use specific GPO to set a defaults template, check this article: http://blogs.technet.com/b/mrmlcgn/archive/2013/02/26/windows-8-associate-a-file-type-or-protocol-with-a-specific-app-using-a-gpo-e-g-default-mail-client-for-mailto-protocol.aspx#pi86646=4

Basically you need to export settings from a template computer and then apply that XML using GPO. I was able to verify this works on Windows 8.1 and 10, also works to modify the XML to remove entries you don't want pushed.


Any ideas or hints are gratefully appreciated. I've been beating my head against my desk for a few days now!



Link to comment

Recommended Posts

  • 0



AlternateShell does not fix the problem. i have tried that already before even writing to this thread. the problem only exists with published application. in a full desktop you can fix it by deleting registry keys and the appassoc.xml. 


i also have a case opened and citrix linked it with sabastianos. i can only repeat what he already said:


citrix confirmed the issue and has opened a case with microsoft in the meantime. the issues is caused by the hashes registry key which disables filetype hijacking from malware. this "feature" already existed in previous windows builds, but something changed with server 2016.


microsoft remote apps are working, because they load rpdinit.exe in the background. citrix is using wfshell.exe which is obviously missing a part to handle microsofts new security measures.


there is no workaround available atm. only for full desktop, but not published apps.

Link to comment
  • 0

For issues regarding Server 2016, please see Nathan's post here in the following thread:



Citrix has a case opened with MS and the above thread will be updated for this. This is for issues with multiple versions of Outlook as a published application from Server 2016 on at least build 1607. We're not sure if it has to do with the hashes or not, at least not entirely, as other applications like Word are fine and seem to pass their hashes just fine.

Link to comment
  • 0

Hello all,


Microsoft has provided a private fix for this issue on Windows Server 2016.  Citrix Escalation has tested this fix internally and confirmed that it does in fact resolve the issue.  The target release date for this fix according to Microsoft is by the end of November 2017.  Microsoft recommends monitoring https://support.microsoft.com/en-us/help/4000825 for this update.  
Citrix article referencing this issue is available here: https://support.citrix.com/article/CTX228597 
Please reference the CTX article above to confirm that what you are seeing is a match and not some other issue with Content Redirection.
Link to comment
  • 0

Hello all,


I can confirm that KB 4051033 available here: https://support.microsoft.com/en-us/help/4051033/windows-10-update-kb4051033 resolves the issue in my lab and is the release provided by Microsoft to fix this particular problem.  We've notified Microsoft that the issue description is missing from the release notes and they are working to get them updated.


I've updated https://support.citrix.com/article/CTX228597 to reflect this information.  Thank you everyone for your patience!

Link to comment
  • 0

you must set a default browser with the appassoc.xml like described here:




or my tool SetDefeaultBrowser should work aswell. http://kolbi.cz/blog/?p=396


A User has no Default Browser set on first Login on a XenApp Server. You MUST set the Default or delete the Citrix.ServerFTA from RegisteredApplications - else you will see a popup. BUT after this microsoft patch, you can select the checkbox to not ask again and its working. before that patch, it asked for every URL again.

Link to comment
  • 0
On 9/12/2019 at 9:18 AM, Roland Siefermann said:

Having the same problem with Windows Server 2016 Build 14393 having KB4512495 (Update of August 2019 which should supersedes KB4053579) installed.

Default Browser works in Published Desktop without asking for the default app. But in Published App it keeps asking.

Any Suggestions?



progress2005, did you find a solution to this? Experiencing the exact same issue with Windows 2016 Build 14393 and the latest Microsoft Updates installed.

Link to comment
  • 0

Thank you, but I've already have that GPO- setting and that didn't help. Found that there were some issues with Windows updates in SCCM, so I searched online and installed all available updates. A bunch of updates were installed, and voila - the issue disappeared magically. That was a couple of days of wasted troubleshooting...

Link to comment

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...