wisherut - sorry that OnDemand doesn't allow you do install the plugins that you need. There is a ticket for tracking interest in including the Source Editor in OnDemand - see CONF-24922 - feel free to indicate your interest here.

There are some technical and security reasons while plugins cannot be installed in OnDemand hence the limitation. There's some more information in the Atlassian OnDemand Plugin Policy.

In summary, if you want to install any plugin in your Confluence instance you will need to host Confluence yourself (or use a third-party server hosting service).

Craig, thank you very much. You have put your finger right on my problem. We are subscribing to Confluence OnDemand to evaluate Confluence. So that's why I haven't been able to install the Source Editor.

Confluence is cleary an excellent tool, and if we hosted it ourselves, it might be what we need. Confluence OnDemand, however, is in my opinion too limited in capability for us.

wisherut - without knowing the specific version of Confluence 5.0 you are trying (it is still in development, though we do have releases for customers migrating from OnDemand to behind the firewall) it will be difficult to know if I'm providing accurate information (since the plugin manager has been upgraded during development).

Regardless, here goes. If you select "Manage Plugins", on the right hand side of this page (shown below) is a link "Upload Plugin" - this will allow you to upload a new plugin (this is assuming you have the required rights).

If this is not helpful I'll need further information:

• Exact Confluence version (it should be in the foot of most pages)
• Exact "Atlassian Universal Plugin Manager" version
  • The can be found in "Manage Plugins Screen". Under "System Plugins" click "Show System Plugins", find "Atlassian Universal Plugin Manager Plugin" click on it and confirm the version. (My version is 2.7.6 - so hopefully these instructions do not vary much if you are using a different version).
• If you are using OnDemand, then it is not possible to install your own plugins (this is a restriction of OnDemand).

From : https://marketplace.atlassian.com/plugins/com.atlassian.confluence.plugins.editor.confluence-source-editor/reviews

After you download this plug-in (the .jar file), how do you install it? Where are the instructions for manually installing this plug-in? This must be one of the best kept secrets in your company. I have submitted requests for this through every possible mechanism, and I always get the same answer: a reference to the plug-in exchange where you can automatically install many plug-ins. Please direct me to these instructions.

More info: The instructions in the Confluence help at https://confluence.atlassian.com/display/DOC/Installing+a+Plugin don't match the user interface that I am working with. I am using Confluence 5.0. I can access A Manage Plugins page, but it does not have an Install tab. The following in the instructions, however, seems relevant to my problem: "Note: Not all plugins can be automatically installed. Some required manual installation. These plugins will have a Download button instead of an Install button. In these cases, you should read and follow the plugin's installation instructions." I don't see anything on the Manage Plugins page, about installing the Confluence Source Editor. I do, however, see the site where you can download it: https://marketplace.atlassian.com/plugins/com.atlassian.confluence.plugins.editor.confluence-source-editor. I have downloaded it, but I do not know how to install it. So I am back to asking the same question.

wisherut - which version of Confluence are you trying to install plugin into? Also, if you have upgraded the UPM (Universal Plugin Manager) the user interface is probably different, so if you can confirm the version of that I can be much more helpful.

In terms of manually installing a downloaded plugin, there is usually an upload link that allows you to upload the plugin yourself. The specific location / page this is on depends on the version of UPM.

If you have any further information (such as a support ticket where you've been asking for help) this may give me some more context to get you going much faster.