How do I batch export or archive multiple sites?
Go to Site Archive.
Select the Site Archive tool from Tool Menu in the Administration Workspace.
Click Batch Import/Export.

Select a term from the drop-down menu.
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The term drop-down menu will be populated with the existing terms in your instance of Sakai. Click on the term you wish to archive to select it.
Click Archive.
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Confirm the list of sites to be archived.
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You will see a list of all sites from the selected term. If this list is correct, click Archive these sites to create the site archives.