When installing Lotus Notes and then installing the Archiving Plugin, the plugin will not appear under the action drop down list.
When installing Lotus Notes in Multi-User mode (default installation), the Notes Data folder will not be created in Program Files (x86) folder but in the '\Users\[username]\AppData\Local\Notes' folder.
During the installation, it is important to select the Only for me (Single User Install). Once the installation is completed, then you could install the Archiving Services for Lotus Notes. After the Single User installation, if another user logon to the system, they will be able to see the plugin along with the created mail box (if a custom POP account is created.)