It might take a while to rebuild all sites if you have a large network to manage. In case of any unexpected network outage, you can back up all site definitions into a .zip file before rebuilding sites, and then import them back afterward to avoid the site data lost.
1.Log into Domain Management page.
2.In the Domain Management page, select Operations > Site Manager from the quick access toolbar.
3.In the Site Manager, right-click the My Network node in the site tree and then select Backup Site Definition from the drop-down menu.
4.Click the hyperlink in the pop-up dialog box to download the backup site definition file.
5.Click OK. The default location of the exported file is C:\Users\<your username>\Downloads.
Tip: To import the backup file, right-click the My Network node and then select Load Site Definition. Select the .zip file and click Open. The current site definition will be overwritten.