When is the License Service Check Date enforced on a BIG-IP system?

The Service Check Date determines whether a particular software version is allowed to run under the device’s license.

When installing or upgrading TMOS, the installer checks the Service Check Date stored in the BIG-IP license file.

If the license date is older than the minimum required for the target version, the software installation is blocked .

This check happens specifically during a software install , not during routine device operations.

Editing virtual servers or system startup do not trigger this validation.

Thus, the enforcement happens during software installation .