Page Comparison

When pasting mention, “Unknown user” is shown.

This is a limitation of Confluence.
User is resolved when you publish the page. You have to be patient until you publish the page.

Users on the external site are not found.

The destination space admin has to allow your space to mention users in their site explicitly.

See How to enable mention from external sites.

“Unrestricted” link is shown.

Image Added

This is a bug of Confluence. We hope Atlassian fixes it.

https://jira.atlassian.com/browse/CONFCLOUD-72376

Notification is sent to the mentioned user.

Notification is sent to the mentioned user when the page is pushed to the destination space.