Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello Anamika MukherjeeID,
Based on this document: What happens to my data and access when my Microsoft 365 for business subscription ends?, when a subscription expires, it goes through multiple states before it is ultimately deleted. And if the administrator doesn't reactivate the subscription while it is expired or disabled, the subscription is deleted. When the subscription is deleted, all customer data—from user data to documents and email—is permanently deleted and is unrecoverable.
So, if your customer's subscription has expired for 5 months, your customer will not be able to reactivate the deleted subscription or recover his data even after purchasing a new subscription and assign new licenses.
As for the data that can be recovered within 180 days, this is for the active tenant (subscription).
Best regards,
Jennifer