My admin deleted to user accounts by accident, while she was trying to revoke their moderator status. Is there a way to restore?

Unfortunately not. If you have a recent backup you could restore it but it would restore the entire community (meaning a loss of content since the last backup).

There is no “undo” for deleted members. 

As mentioned by Randy, there is no "undo" for member deletion. A database backup would need to be restored which contained the user (and potentially their content, that also was deleted). Please note: restoring the backup will revert your community back to the point where your community was at the time of the backup, you will lose any content/settings/etc..

On 6/18/2022 at 8:00 AM, Jim M said:

As mentioned by Randy, there is no "undo" for member deletion. A database backup would need to be restored which contained the user (and potentially their content, that also was deleted). Please note: restoring the backup will revert your community back to the point where your community was at the time of the backup, you will lose any content/settings/etc..

 

Well, I am glad my server admin did not think it is impossible. He managed to bring all their contents and settings from a week old backup to the working current version without the community losing any content. He had to write some custom script for this though.

Of course restoring data from a backup selectively would be possible with custom development, however custom restoration of specific data is not something we can provide assistance with, nor would we recommend in most cases