In batch upgrade you can create a .bat file that updates all the domains, using the Administration module mechanism.
To create a batch upgrade file:
In Notepad, create a batch file (e.g., BatchUpgrade.bat).
Enter a line for each domain you wish to upgrade (starting with a line for the admin schema), as shown in the example below:
Upgrade 9999 //upgrade admin schema
Upgrade <proj_id> //upgrade specific domain
silent //optional flag: run in background
For a complete list of domain project IDs, run the following SQL Query: SELECT * FROM Project.
Double-click the batch file to run it and upgrade the defined domains.
If you added the silent flag to the file, no dialog boxes or messages are shown.
You can schedule the batch file to run at a convenient time using Windows scheduler (for example, during the night or over the weekend).