Outlook 2013 XLS Attachments cannot be opened in Excel 2013 due to Trusted Center restrictions with Outlook Secure Temp Folder

Dear all,
I'm having some serious issues with Office 2013's Trusted Center settings. In Outlook 2013 XLS Attachments cannot be directly opened in Excel 2013 with double-clicking due to Trusted Center restrictions for Excel 2013 regarding Outlook's Secure Temp Folder.
I tried to adjust the corresponding Office 2013 Administrative Template within my GPOs but to no prevail.
I did find out that Outlook 2013 places an attachment within the Outlook Secure Temp Folder located at "C:\Users\a.ollischer\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.Outlook\PPIU10RW” before passing it to Excel 2013 in order to
open it. It fails due to not trusting this location though I added the corresponding path to my Trusted Locations.
What can I do in order to make this work without having to tediously save each and every attachment to "My Documents" prior to opening it? Any help would be greatly appreciated.
Alex
Alexander Ollischer Diplom-Wirtschaftsinformatiker (FH) Citrix & Microsoft Certified Engineer (CCEA, CCEE, MCSA, MCSE, MCDBA, MCTS) Afontis IT+Services GmbH Baierbrunner Straße 15 81379 München Deutschland Telefon (089) 74 34 55-0 Fax (089) 74 34 55-55
mailto:[email protected] http://www.afontis.de http://www.itganzeinfach.de Amtsgericht München, HRB 109 005 Geschäftsführer: Thomas Klimmer

Hi Maurice 7785,
Deal and customize attachment security behavior to access such kind of blocked file format. Usually, Outlook does not allow users to open such unsafe type of attachments. It means they are blocked them by default, so you need to unblock such items using REG
values.
Take more help from the similar thread:
http://social.technet.microsoft.com/Forums/en-US/53563c4b-d27f-4866-a5a8-95eb1ad1a3e6/hide-attachements?forum=outlook
Note: Improve community discussions by marking the answers helpful otherwise respond back for further help.
Thanks
Clark Kent

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