العمليات في Microsoft 365 لإعداد تطبيق Office، واسترداد مفاتيح المنتج، وتفعيل التراخيص.
Hello Mohammad,
Thank you for posting on the Microsoft Q&A Support Forum
In addition to what was posted by @lTin Luna Transferring Microsoft Office 2021 to another computer can be done but it depends on the type of license you have. Here is why your product key might not be working
Reta License - Can be moved to another PC if uninstalled from the old one
OEM -Tied to the original device; cannot be transferred
If your license is transferable, you must remove Office from the old device by going to Settings > Apps > Installed Apps
Find Microsoft Office 2021
Click Uninstall
Install Office on the New Computer Visit office.com/setup
Sign in with the Microsoft account linked to your product key
Enter your product key and follow the prompts to download and install
If the key isn’t accepted, it might already be linked to a Microsoft account. Try signing in with any account you’ve used before.
Kindly refer to this link for further Information
تنزيل Office 2021 أو Office 2019 أو Office 2016 وتثبيته أو إعادة تثبيته - دعم Microsoft
نقل ترخيص Office إلى جهاز آخر أو إلى شخص آخر - دعم Microsoft
I hope this helps with your concern.
Best Regards,
Odinaka | Microsoft Q&A Support Moderator.