“Maintenance Mode” is an add-on for Jira by Atlassian, created to allow Jira admins to set a maintenance landing page and redirect all users to it during maintenance time. Jira admins can decide which users / groups can still use Jira during maintenance and not being redirect to the landing page.
How it Works?
Go to the "Add-ons" page in the admin section (must be Jira admin to access this).
Look for "Maintenance Mode" in the left panel, click "Maintenance Mode" under it.
At the first use, the "Active" field not exist, as you must set a maintenance page first.
Set Maintenance Page
Set your maintenance page as described in the fields under the header "Set maintenance page".
Once you clicked "save" you can see your changes under "Preview" and see how your maintenance page looks like.
Allow Jira Access in Maintenance
Set users / groups to have access to keep use Jira while everyone else are in maintenance mode.
If you activate "Maintenance Mode" without set users / groups to have access in "Maintenance Mode" you will be locked out from your Jira.
To fix this issue you will have to connect to your Jira database and delete the record from table "AO_4CE5E7_MAINTENANCE_MODE"
This will make the plugin act like it was just installed, you will have to set your maintenance page all over again.
Remove Jira Access in Maintenance
Remove given users /groups access to keep use Jira while everyone else are in maintenance mode.