activation fails

You want to activate Acronis True image and provide a serial number. The serial number is accepted, but you see this error message:

Activation required! Days remaining: 30

You try to resolve the issue by clicking Resolve issue or Enter serial number, but you see this message in the further steps:

The serial number is registered to another account.

Issue

Online license activation of Acronis Cyber Protect Home Office or Acronis True Image fails if the network connection to Acronis servers is blocked in the firewall software, Windows hosts file, router settings or by Internet Service Provider (ISP).

Users of Acronis True Image 2018, 2019, 2020 and 2021 Standard can activate Acronis True Image using the offline method: