I am currently unable to access my outlook mailbox.

Check Microsoft’s official Service Health Status site first; if Outlook.com is healthy, use the matching sign-in or mailbox-recovery step below rather than assuming a server outage.^1^

1. Check for a Microsoft service incident

Open the Service Health Status site.

• If Outlook.com shows an incident: wait until its status returns to normal, then try again. Microsoft specifically directs users who cannot access Outlook.com to this page.^1^
• If the status is healthy: the failure may be account-, browser-, device-, or network-specific. Continue below.
• Third-party outage trackers contain user reports, but they do not constitute official confirmation of a Microsoft outage.

Note the exact error message and whether you sign in with an Outlook/Hotmail address, another provider’s address, or a phone number. Those details determine the relevant recovery path.

2. If you cannot sign in at all

1. Open a private or incognito browser window and go to Outlook.com.
2. Enter the same Microsoft account username and password used for Outlook.com.
3. If sign-in still fails, run the Microsoft account sign-in helper. Microsoft recommends the account troubleshooter when Outlook.com, Hotmail, Live, or MSN sign-in fails.^2^
4. If the message says the account is blocked or unusual activity was detected, use Unblock my Outlook.com account. A new device, travel, or unusual sign-in activity can trigger identity verification or a temporary block.^3^

3. If you use only a Gmail, Yahoo, other third-party address, or a phone number

This is a specific Outlook.com requirement rather than an outage. A Microsoft account configured only with a third-party address or phone number must add a Microsoft first-party alias—an Outlook.com, Hotmail, Live, or MSN address—before it can access the Outlook.com inbox.

Complete the prompt to add that alias. The original third-party address can remain the account’s primary alias; after the Microsoft alias is added, Outlook.com should open the inbox.^1^

4. If you can sign in but mail will not load, send, or receive

Check mailbox and Microsoft cloud storage. When cloud storage is full, Outlook.com cannot send or receive email, and messages received while it was full are returned to their senders and cannot be recovered.^4^

Also update the Outlook credentials if the Microsoft account password was recently changed.

5. Escalate if none of these branches matches

If Outlook.com opens, select Help on the menu bar, enter the problem, then scroll to Still need help? and select Yes. If sign-in itself is impossible, use Microsoft’s account support route.^4^

Provide support with the exact error text, approximate failure time and time zone, affected address type—without posting the full address publicly—and whether the official service status was healthy.

References

1. Fixes or workarounds for recent issues on Outlook.com | Microsoft Support
2. How to sign in to Outlook.com | Microsoft Support
3. How to sign in to Hotmail | Microsoft Support
4. Can't send or receive email in Outlook.com | Microsoft Support