"Cannot open file" error when open .xnk Link with Outlook 2007

There is some issue occur when you try to open a link to a Microsoft Exchange Server public folder which has .xnk file name extension in Microsoft Office Outlook 2007. These error are "Cannot open file" and "The command line argument is not valid. Verify the switch you are using. Mainly these problem issue occur when additional security in Outlook 2007. By default, Outlook 2007 denies access to these files.

Workaround

Warning: This workaround may make a computer or a network more vulnerable to attack by malicious users or by malicious software such as viruses. Use this workaround at your own risk.

To solve this types of issue by create a link associated between the .xnk file name extension and Microsoft Outlook 2007.

To do this, follow these steps:

1. Click Start, click Run, type Explorer in the Open box, and then click OK.

2. On the Tools menu, click Folder Options.

3. In the Folder Options dialog box, click the File Types tab, and then click New.

4. In the Create New Extensions dialog box, type xnk in the File Extension box, and then click OK.

5. Click to select XNK under Registered file types, and then click Advanced.

5. In the Edit File Type dialog box, type XNK next to the icon, and then click New.

6. In the New Action dialog box, type OPEN for Action, and then type the following text under Application used to perform action: "DriveLetter:\path\Outlook.exe" /x "%1"

Note By default, the path of the Outlook.exe file is as follows: "C:\Program Files\Microsoft Office\OFFICE12\Outlook.exe" /x "%1"

7. Click OK twice.

8. Click Close.

Important You should open or download only those .xnk files that are sent by a known source.