Activation requires an internet connection. If you are behind a corporate firewall or using a VPN, the activation server might be blocked. Try disabling the VPN or contacting your IT administrator to whitelist Kutools' server domains.
To avoid security risks associated with "cracked" keys or unofficial sources, always purchase through authorized channels: Official Website ExtendOffice.com offers volume discounts and a 60-day money-back guarantee. Microsoft Marketplace : You can also find Kutools listed on the Microsoft AppSource/Marketplace kutools license key updated
You own a license, but after updating Kutools to the latest version (e.g., from v25 to v26), the software asks for a new key or says your license is invalid. Activation requires an internet connection
