How to change the file types blocked by Companion in Windows
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Summary
Atlassian Companion, which is used for editing files in Confluence, blocks users from editing files that may pose a security risk, such as executable files. Companion will not open any file with a COM, .EXE, .BAT, or .CMD file extension. Companion will also refuse to open any file that has no default application associated with it, and has a file extension listed in the PATHEXT environment variable. The default value of this environment variable is:
1
.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSCYou can further limit the files that companion is allowed to open in Windows by setting the COMPANION_BLOCK_LIST environment variable. This change must be made on each individual user's computer. There's no way to set this for all users in your site. This environment variable is only available in Atlassian Companion 1.0.0 and later.
Solution
To set the COMPANION_BLOCK_LIST environment variable:
In Windows settings, search for Environment Variables and choose either Edit the system environment variables or Edit the environment variables for your account.
Click the Environment Variables button.
Click New'.
In the Variable name field, enter '
COMPANION_BLOCK_LIST'.In the Variable value field, enter the file extensions you wish to block, separated by a semicolon as follows. In this example we're blocking Photoshop and Visio files.
1.PSD;.VSDRestart Atlassian Companion app.
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