An issue has been deleted from my project in error. Is it possible to, and how should I retrieve the issue directly from an archive, or some such place, and have it reappear on the project as in its original state?
No. Deleted means deleted, the only things left are a hole in your project key numbers and (hopefully) a backup.
I know OnDemand is backed up, but I don't know if Atlassian will retrieve it for you, and if they do, whether it'll be a simple copy of the data they found, or a full re-insertion of it all (Which needs SQL, re-indexing and downtime). You should ask their support team in the first instance.
(Also, consider removing "delete" permissions for most/all users)
Typically we won't restore accidentally deleted data. It's recommended that you periodically take your own backups.
If a single issue has been deleted and you don't have a backup, most of the data can usually be pieced together from JIRA email notifications.
I'd raise this, as soon as possible, with support directly - Michael may well see it here, but they'll need an official support request in order to do anything. Head to https://support.atlassian.com and have your account details to hand (contacts on your side, and at least the url for your Cloud instance)
The audit log (if enabled) can be filtered for delete, but otherwise, no. You can't report on what's not there. The closest you could get is look at the while list of issues in the project, and look for holes in the numbering - a hole is either a deleted issue or one that was moved out of the project.
Jira sent a notification saying I deleted an issue. However, I have not worked on Jira since Morning. Is there a way to go back and see what happened there? Is it possible someone else used my system ( I stepped out for a while) and deleted it? Am i being ridiculuous here?
I'd like to know how did the issue get deleted.
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