Microsoft Office 365 - License not activated (Macbook user)

Hello FongW, Welcome to Microsoft Community. I am a Microsoft user just like you, I hope you are doing well? What do you mean by "restore previous purchase"? Is your Microsoft 365 subcription from Apple still active? Have you tried to reactivate your Office 365 apps by signing into Office apps using your account associated with this subscription from Apple? If you have not, I recommend you sign in Office 365 app using the same account used in purchasing this subscription and let me know if you are still experiencing the same issue. Please let me know if you need more assistance. Give back to the Community, Help the next person who has this issue by indicating if this reply solved your problem. Click Yes or No below. Warm Regards

Hi Raymond K,

Thanks for the replied. I have signed in with my apple ID but still showed the errors as attached.

FongW, I appreciate this feedback. Have you contacted Apple to find out the status of your subscription? Microsoft 365 subscription is not a lifetime license, it needs to be renewed either annually or monthly. Contact Apple support to know if your subscription is active. Looking forward to your response.