if u have classic outlook through the microsoft store when is it good till

Classic Outlook installed from the Microsoft Store stays available as long as the underlying entitlement (license) remains valid. In this case, the entitlement comes from the active Microsoft 365 subscription that includes classic Outlook.

Key points based on the provided information:

• Classic Outlook is a desktop app that must be downloaded and installed; it is included with many Microsoft 365 subscriptions that include the desktop apps.
• If classic Outlook was accidentally deleted, it can be reinstalled either via the direct download links or from the Microsoft Store.
• The Microsoft Store version does not have a separate expiry date; its validity is tied to the Microsoft 365 subscription. When the subscription is active, classic Outlook remains licensed and usable. If the subscription expires or is cancelled (and any grace period ends), the classic Outlook app will remain installed but will eventually go into a reduced‑functionality state.

So, the classic Outlook from the Microsoft Store is “good until” the Microsoft 365 subscription that grants the license expires or is cancelled.

References:

• What version of Outlook do I have?
• Install or reinstall classic Outlook on a Windows PC
• You can't open classic Outlook on a new Windows PC