Outlook Down? How to Check Status and Keep Working

Is Outlook down right now, or is it just me?

Start with Microsoft's own status pages, then rule out your own device and network. Microsoft says the Service health page in the Microsoft 365 admin center is the place to check whether a problem is a known issue with a resolution in progress, before calling support or spending time troubleshooting ^[1]. If the admin center itself will not load, Microsoft points to a public service status page and to its @MSFT365Status account on X for information on certain events ^[1].

A quick order of checks that works for most people:

1. Official status first. Work or school accounts: ask your IT team or check Service health if you are an admin ^[1]. Anyone: open Microsoft's public Service Health Status page, which shows a short status line for Microsoft 365 (Business or Enterprise) and for Azure ^[2].
2. The official status account. Microsoft 365 Status posts incident numbers and short progress updates during larger events ^[3][5].
3. Personal Outlook.com accounts. Microsoft's Outlook.com support page sends users with access problems to the Service Health Status site, and lists recent known issues with their status, such as FIXED or WORKAROUND ^[10].
4. Crowd reports as a signal. Outage trackers such as Downdetector count user reports; they suggest a problem but do not confirm its cause (see below) ^[9].
5. Your own side. If official pages show no issue, test another network (for example mobile data instead of Wi-Fi), another browser, or another device.

If you sign in with a work or school account and your organization has its own help desk, that help desk is usually the fastest source, because Service health can also list issues that originate in your own organization's environment ^[1].

What did Microsoft confirm about the 12 November 2026 outage?

Microsoft confirmed a real incident on Thursday 12 November 2026. At 17:54 UTC (20:54 Istanbul time) the Microsoft 365 Status account said it was investigating reports of users having issues accessing Exchange Online mailboxes through multiple connection methods in the Americas, under incident EX1550543 ^[3]. Exchange Online is the Microsoft cloud email service behind Outlook for work and school accounts.

Thirteen minutes later, Microsoft said the issue may affect Microsoft 365 service connectivity for users in any region ^[4]. A separate entry, MO1550821, covered impact on other Microsoft 365 services; Microsoft's service health text, as republished by the University of Pennsylvania's IT office, listed Exchange Online, Microsoft Teams, SharePoint Online, Microsoft 365 Copilot, Defender XDR, Planner, To Do and several Purview services, among others, as potentially affected ^[6]. The same republished entry said the affected mailbox connection methods may include Outlook on the web, MAPI (used by Outlook desktop), Exchange ActiveSync (used by many phone mail apps) and the REST API ^[6].

What did Microsoft say caused it?

Microsoft's explanation changed as it investigated. Microsoft's service health updates, as republished by the University of Pennsylvania, said the elevated load was not driven by an overall increase in traffic but by a large number of servers being unexpectedly unavailable, shifting load onto the remaining infrastructure ^[6]. At 21:00 UTC (00:00 Istanbul time on 13 November) Microsoft said an alternative service health check method had allowed a subset of affected servers to return to service and that it was applying the change more broadly ^[5]. The republished service health text added that a small number of configuration updates were being investigated as potential contributors ^[6]. That is a line of investigation, not a confirmed root cause.

Status as of 13 November 2026, 00:35 Istanbul time: Microsoft's public status page still showed service degradation for Microsoft 365 (Business or Enterprise), saying users may be unable to connect to multiple Microsoft 365 services ^[2]. The latest update in the republished service health text, at 21:31 UTC on 12 November (00:31 Istanbul time), listed both incidents as service degradation and not yet ended, with Microsoft still restarting and validating affected servers and assessing whether reverting recent configuration updates would speed recovery ^[6]. Check the status page for the current state. Microsoft's status list includes a final stage, Post-incident report published, for the report that gives root cause and next steps ^[1].

How do the Microsoft 365 status labels differ?

Service health uses two issue types and a set of status labels. An advisory means Microsoft knows of a problem affecting some users while the service is still available, often with a workaround. An incident is a critical issue where the service or a major function is unavailable, such as sending and receiving email or signing in ^[1]. The 12 November mailbox problem was classified as an incident ^[6].

Each issue also has a status, from Investigating through Service restored ^[1]. Two labels are easy to misread. Service degradation does not mean everything is down; Microsoft uses it when a service is slower than usual, intermittent, or missing a feature ^[1]. False positive means Microsoft found the service healthy or the cause outside the service ^[1]. Planned maintenance does not appear in Service health at all; Microsoft lists it in the Message center instead ^[1].

The table below summarises the main labels, using Microsoft's own definitions.

How can I keep working when Outlook is down?

The right fallback depends on what is broken. Switching from the desktop app to the browser helps only when the browser path is still working, and on 12 November Microsoft listed Outlook on the web itself among the possibly affected connection methods ^[6].

1. Use what is already on your computer

Classic Outlook for Windows needs Cached Exchange Mode turned on, which downloads a copy of your messages, and by default it synchronises 12 months of email; Microsoft says you cannot send or receive email until you reconnect ^[11]. The new Outlook for Windows has offline access turned on by default under Settings, General, Offline, and Microsoft lists reading email, creating and saving drafts and sending new messages to the Outbox as things you can do offline ^[11].

2. Try another route, but only one at a time

If the desktop app fails, try Outlook on the web; if the web fails, try the mobile app on mobile data. During a wide incident all of them may be affected: on 12 November Microsoft listed Outlook on the web, MAPI, Exchange ActiveSync and the REST API as potentially impacted connection methods ^[6]. Avoid removing and re-adding your account during an outage: it will not fix a server-side fault.

3. Move urgent work to an approved channel

When email and Teams are both affected, use whatever backup your organization has approved, such as a phone call. Do not forward work mail to a personal address without permission; that can break your organization's data rules.

4. Note the incident number

If you contact your help desk, quoting the incident ID (EX1550543 on 12 November) saves time ^[3].

Can I trust Downdetector?

Downdetector is useful as an early warning, not as proof. It collects problem reports from users and monitors other online sources, then shows a possible issue when reports are significantly higher than the typical level for that service ^[9]. Its baseline is the average number of reports for that time of day over the previous six months, and statuses update every four minutes ^[9].

That design has limits. A count of reports is not a count of affected users, and it cannot tell you the cause. On 12 November The Verge reported that Outlook problem reports on Downdetector began to spike just before 1 p.m. Eastern time ^[8], and The Guardian reported nearly 130,000 reports at the peak across Microsoft 365 apps ^[7]. Those figures show scale of complaints, not the number of people cut off. A spike can also follow a widely shared rumour, or reflect a problem at an internet provider rather than at Microsoft.

Treat a Downdetector spike as a reason to check Microsoft's status page and the official account, not as a replacement for them ^[1][2].

What do Outlook error codes mean?

Error codes help separate a server problem from a problem with your message or account. Two families matter most.

Email bounce codes (NDRs)

When a message cannot be delivered, Microsoft 365 usually sends back a non-delivery report with an enhanced status code in the form x.y.z ^[12]. Microsoft explains that a code starting with 5 indicates a permanent error and a code starting with 4 a temporary one ^[12]. For example, 5.1.1 means a bad destination mailbox address, often a typo or a recipient that does not exist ^[12].

Web error codes in the browser

Outlook on the web runs over HTTP. A 503 Service Unavailable response means the server is not ready to handle the request, commonly because it is down for maintenance or overloaded, and it is meant for temporary conditions ^[13]. A 503 during a known incident is consistent with a server-side problem.

Error messages that ask you to install something, change security settings or enter your password on an unfamiliar page are not normal error messages; see the next section.

Is an 'account locked' email during an outage a scam?

Outages are a common hook for phishing, because people expect problems and act quickly. Microsoft describes phishing as messages that try to look like official communication in order to steal usernames, passwords, card or bank details ^[14]. Its warning signs include links whose displayed address does not match the real destination, sender addresses with added numbers or changed letters, unexpected messages, and requests to enable macros, adjust security settings or install applications ^[14].

Practical rules during any outage:

• Do not sign in through a link in an email that says your mailbox is locked, full or suspended. Type the Outlook address yourself or use the app you already have.
• Remember that real outage updates come from Microsoft's status page, the admin center and the official status account, not from a personal email asking you to verify your password ^[1][2].
• Report suspicious messages to your IT or security team, as Microsoft advises organizations to do ^[14].
• If you already entered your password on a suspicious page, change it from a trusted device and check your account's security settings.

For what to do if you think your details have already leaked, see the guide Was My Data Leaked?. If you are still on an unsupported operating system, the guide Windows 10 end of updates explains why that raises the risk from malicious attachments.