Log in as a Jira administrator to carry out the following instructions.
Ensure that the plugin version to be installed is compatible with your Jira version. (View: Compatibility matrix)

Install Plugin

Server With Internet Access

From Atlassian Marketplace,

Navigate to Find new add-ons
Enter “Attachment Checker” in the search field
Click on Free trial button / Buy now link in the UPM to install the plugin
Wait for the installation process to complete

Server With Internet Access

Upload plugin that is downloaded from the Atlassian Marketplace

Navigate to Manage add-ons
Click on Upload add-on link
Click on Choose file button and upload the plugin version downloaded from the marketplace (e.g. AttachmentChecker-2.5.2.jar)
Click on Upload

When Plugin is Installed Successfully

A pop-up resembling to the image below will appear

A Marketplace license is required for the plugin to work.

Navigate to Manage add-ons

Under the UPM. generate the license key via the following methods

Free Trial

Click on Free trial button to generate a trial license key

^{*The Attachment Checker for Jira offers a free trial for 30 days.}

Purchase License Key

Click on Buy now button

If you've enjoyed using the plugin, drop us a comment by rating and reviewing our plugin.

Once a valid license has been saved, you will be able to use our plugin