Users facing wrong date format in Citrix published application, why?

This is using the newly-setup Citrix Xenapp 6.5 advanced server. Few applications, include MS Dynamic NAV client, successfully published. Users can now use these published application without connection problem. However, for NAV client, users feedback that they found the date format is "invalid". The date format they wanted is "dd/mm/yyyy" while they were given "mm/dd/yyyy". I checked both citrix and NAV server are using dd/mm/yyyy in control panel > regional and language. All these date format shouldn't be affected by the user's laptop/pc's regional and language settings, right?

How can I assure the correct and standardized date format for these published application?

Thanks in advance.
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When users log into a Citrix desktop application or seemless application, their locale will be that of the server hosting the application.

Check that your Region and Language settings for the Welcome screen and new user accounts settings is what you need it to be.  This is what it looks like for me (Locale is Norwegian, but you probably want UK English.
Welcome Screen and New User Accounts
It sounds to me like you have US Locale for new user accounts and potentially welcome screen too.

Use the Copy Settings to copy your locale onto the welcome screen and new user accounts.  Once you have corrected this - a reboot is required.  You may also need to reset the users profile so that they get a fresh one using the correct settings.

If this doesn't solve the issue then the problem is most likely the application itself - publish another application from the same server - something that has a date picker built into it like Outlook or Excel - and verify that the locale is correct.  You could even publish the command prompt and then inside that type echo %date% to see the format.  Some applications are poorly written and the date format is hard coded to a specific date format, but there's not much that can be done about that.

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Brian CTXSupportCitrix ConsultantCommented:
By default, Citrix will pull the time setting of the client machine that is connecting, including the time zone and format.  You would need to disable that functionality in policy, but be aware that other applications may have less desirable results with that setting if your users are in different time zones.
MichaelBalackAuthor Commented:
Hi Experts,

Let me check on the citrix server, I will get back to you guys.
MichaelBalackAuthor Commented:
Correct, date format can't be adjusted within Citrix, it determined by OS regional and language.
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