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Open ZIP file attachments in Outlook 2003 with out saving to disk first.

Posted on 2004-04-20
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Last Modified: 2007-12-19
I know this sounds odd But we need to lower security on a couple of e-mail clients ( Outlook 2003 ) to be able to open ZIP attachments without saving the to disk first. I looked around but could not find anything. is there a registry setting that can be changed?

Thanks
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Question by:Ljohnstone
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by:Mob-bom
ID: 10871672
what is listed under this reg key? HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security
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by:Ljohnstone
ID: 10877830
(default)                             REG_SZ                     (Value Not Set)
Level                                  REG_DWORD             0x00000001 (1)
OutlookSecureTempFolder   REG_SZ                     C:Documents and Settings\LMJ.XXXX\Local SettingTemporary internet Files\OLK20\
UseCRLChasing                   REG_DWORD             0x00000001 (1)
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by:Mob-bom
ID: 10878192
Ok, under that key

Add a string value "Level1Remove"
For the value of that string insert ".zip"
(no parentheses)
If you want to add others make the Level1Remove value ".zip;.url;etc"
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Author Comment

by:Ljohnstone
ID: 10878466
I create the string
Level1Remove     REG_SZ   .zip

Rebooted and tried to open a zip file. It still forced me to save it to disk.

I tried to add the string
Level1Remove  REG_DWORD  .zip

But it would not take ascii characters.

Did I miss something?

Thanks for the assistance.
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by:Mob-bom
ID: 10880031
Directly from MS:

Click Start, click Run, type regedit, and then click OK.
Locate and then click the following key in the registry:

HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security
On the Edit menu, point to New, and then click String Value.
Type Level1Remove, and then press ENTER.
On the Edit menu, click Modify.
Type <file_name_extensions>, and then click OK.

make sure you include the period in front of zip in the value: .zip
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by:Ljohnstone
ID: 10881411
I followed your (MS) instructions to the tee and I still get forced to save the file to disk before I can open it.
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by:Mob-bom
ID: 10881709
If you are in an exchange environment, check the Level 2 settings.  The Level 2 settings allow an attachment in, but require that it be saved to disk first.  
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by:Ljohnstone
ID: 10887885
I am in a exchange Enironment, Sorry I should have mentioned that. Would I check that on the server or on the client?
I tried tracking it down on the server but have not been successful thus far. I would like to limit it so only certain users are able to open zip files without saving to disk if possible, but if is an all or nothing situation I can live with that.
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Mob-bom earned 250 total points
ID: 10888908
This is what MS says about -adding- file extensions.  Use the instructions to get to the security settings and look in both level 1 and level 2 for the zip extension.  and yes, I believe that it will be an all or nothing deal.  There may be a way to apply these settings based on groups, but I don't know of the top of my head.

How to block attachment file name extensions in an Exchange environment with the Outlook Security Administrator Package
If you have an Exchange environment that uses the Outlook Security Administrator Package and you want to add more attachment file name extensions that you want to block in your Outlook configuration, you can add more attachment file name extensions to the Level 1 file list. To do this, follow these steps:
Start Outlook with an account that has permissions to change the Outlook Security Form in the Outlook 10 Security Settings public folder.
In the folder list pane, locate the version-specific Outlook Security Settings public folder.

Note For Microsoft Outlook 2000, the name of the public folder is Outlook Security Settings. For Microsoft Outlook 2002 and Microsoft Office Outlook 2003, the name of the public folder is Outlook 10 Security Settings.
Double-click Default Security Form.
Under Miscellaneous Attachment Settings, click to clear the Show level 1 attachments check box.
Under Level 1 File Extensions, type the attachment file name extensions that you want to block in the Add box.

If you want to add more attachment file name extensions in the Add box, you can separate them with a semicolon. For example, if you want to block both the .zip and the .gif attachment file name extensions, type .zip; .gif
Click Close, and then click Yes to save your changes.
Repeat these steps for each Outlook Security Form that you have in the public folder for each security group that you want to add more attachment file name extensions to.
The next time that your users start Outlook, the new settings will be applied.

Note If you the Show Level 1 File Attachments check box from step 4 was already selected to allow all Level 1 attachment file name extensions types to appear in the e-mail message as an attachment, you must add the attachment file name extensions that you do not want to appear in the e-mail message as an attachment by following this one additional step:
Under Level 1 File Extensions, locate the Remove box. In the Remove box, type the attachment file name extensions that you do not want to appear in the e-mail message as an attachment.

If you want to add more attachment file name extensions in the Add box, you can separate them with a semicolon. For example, if you want to block both the .zip and the .gif attachment file name extensions, type .zip; .gif

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Author Comment

by:Ljohnstone
ID: 11167468
Sorry for the delay. The answer is dead on! Thank You for all the help and your Patience.
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