The "Update All" button in the address book updates all business partners by default. In rare cases, however, this behavior may be undesirable, so it is possible to configure a setting that excludes a company from the update.
Procedure:
In the address book, find the companies for which you no longer want to process updates.
In the address book header, press the bulk change button and select the "Selected only" option. The bulk change will then apply to the companies selected in step 1.
Select the "Revision" column and set the value to "999999999".
Confirm the bulk change.
You will notice the result during the subsequent update. The respective companies will be excluded from it.