r/sysadmin • u/Itguy1252 • 1d ago
Is m365 Outlook down
anyone else having issues sending emails?
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u/SimplifyAndAddCoffee 1d ago
I love how any time we start getting complaints, r/sysadmin has a post about it before Microsoft does.
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u/Y_TElectric 1d ago
Microsoft might as well just scrape this subreddit for issue response...
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u/Smith6612 1d ago
I'd be surprised if Copilot isn't already doing that...
Or maybe it broke, because OpenAI also broke.
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u/InsertCookiesHere 1d ago
I seldom even bother checking MS for issues anymore, I just assume the Admin portal will say everything is fine and come here for an accurate assessment.
MS tends not to acknowledges anything but the most severe outages until their already resolved.
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u/MorbrosIT 1d ago
I go to Reddit before checking their health page. I was working on an issue this morning before I knew and the person in front of her says she is having issues and another was like I can't print. Jumped on Reddit and first post I see.
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u/dlucre 1d ago
Down detector exists because the users usually know 'something' is wrong before the vendors do, so I go there first. Then r/sysadmin or other subreddits usually have people with brains who often have a good understanding of what's wrong based on the symptoms.
These places are my go to when things like this happen.
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u/EquipLordBritish 1d ago
You'd think with all their investment into AI, that there would be some kind of immediate and automated announcement that there is a problem, and several (probably worthless) suggestions on how to get around the issue or mitigate it for customers.
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u/homing-duck Future goat herder 1d ago
Why they haven’t done that is simple! Providing good service does not increase their revenue. Selling copilot licenses does.
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u/elfierroz 1d ago
Fkn micrsoft, 1 hour ago they were saying that all services were operational and 2 hours ago, they detected a “false positive” on outlook
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u/WeirdKindofStrange 1d ago
Investigating user reports of Exchange Online issues
Issue ID: EX1464935
Affected services: Exchange Online
Status: Investigating
Issue type: Incident
Start time: 31 Aug 2026, 11:53 GMT-4
User impact
We don't have details on impact yet. We're seeing an increase in user reported issues above our alerting threshold.
Current status
31 Aug 2026, 11:55 GMT-4
We are reviewing service telemetry and available information to determine if there is an issue happening and we'll update this message shortly with our latest findings.
This communication serves as a preliminary notification about a potential issue affecting your service.
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u/Business-Writer2062 1d ago
Aug 31, 2026, 10:33 AM CST
We’ve isolated a common failure pattern across affected Exchange Online requests that is associated with authentication and protocol connectivity. We're analyzing service telemetry to identify the underlying source of impact and validate potential remediation options. Additionally, we’re continuing to assess the scope of impact and monitor for additional affected scenarios.
This quick update is designed to give the latest information on this issue.
Next update by: Monday, August 31, 2026, at 5:30 PM UTC
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u/McAdminDeluxe Sysadmin 1d ago
Aug 31, 2026, 12:23 PM CDT
We've identified a potential corrective action for the affected infrastructure and are evaluating deployment options. We're monitoring service telemetry and affected Exchange Online transactions to determine whether the action is reducing impact and to better understand the scope of affected scenarios.
Next update by:
Monday, August 31, 2026 at 1:30 PM CDT
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u/foxypandamonkey 1d ago
And now, 25 minutes after when we were supposed to get an update, there’s still no update from Microsoft.
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u/Chewskiz 1d ago
Down detector says yes
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u/Forsaken_Ear_5814 1d ago edited 1d ago
O365 status page says all good lol
can't login to Outlook through web browser at my work, get error message. "Updated" Outlook app loads but not syncing
Interestingly Classic Outlook seems to be syncing ok (edit: nevermind, not sycning anymore, emails stuck in outbox, calendar not updating...)
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u/cszolee79 1d ago
The "New" Outlook is just a wrapper for the webmail.
It's trash.
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u/Nesman64 Sysadmin 1d ago
The spike is shrinking, but maybe people have stopped reporting the issue.
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u/Itguy1252 1d ago
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u/balling 1d ago
Literally every admin portal for every product seems to be the last place to post any updates about outages.
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u/ocdtrekkie Sysadmin 1d ago
This is because SLAs often have a financial value for some of their larger contracts, so most companies disable automatic status board checking, and do it manually. Half the time the person responsible for updating the status board is too busy troubleshooting to go and put it on the status board.
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u/Ooops-I-hid-it-again 1d ago
No need to update an admin portal. That's what user reports are for. /s
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u/Fredidiah 1d ago
With nitter being down now, I basically cannot learn about this outage through any official channels without having a twitter account…and I don’t wanna have a twitter account.
Incredible stuff.
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u/the_doughboy 1d ago
A lot of things are down right now, not just M365
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u/Brilliant-Sea-6755 23h ago
Like what?
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u/the_doughboy 22h ago
AWS and Azure were both down. So things hosted on that were as well.
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u/Zealousideal-Neat-82 1d ago
I can't search, from either the Windows client or OWA.
The 365 status account on X just posted about issues. EX1464935.
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u/Skyflori 1d ago
Also having issues in EU, specificly in Germany West Central. Seems an issue with global impact!
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u/Haunting-Prior-NaN 1d ago edited 1d ago
sending emails?
Luckily it seems to be working for me, at least for the time being.
Edit: exol to exol seems to be working, but i am not receiving any smtp mail.
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u/Smart_Dumb Ctrl + Alt + .45 1d ago
So....is anyone else seeing a bunch of "Error: 550 5.6.200 STOREDRV.Deliver; message treated as poison" failures in the message trace logs? Is this going to mean email loss?
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u/rotor_ 1d ago
Aug 31, 2026, 2:55 PM PDT
We're continuing our targeted review of affected infrastructure and recent changes made to the service to definitively confirm the cause of impact. We're additionally continuing to test and implement various mitigation strategies to apply the necessary authentication component, which have so far yielded positive results. We're monitoring these tests and mitigative actions closely and will provide an estimated time to resolution as soon as one is available.
We understand the impact that events like these can have for your organization and we appreciate your patience as we work to mitigate this issue with the highest priority.
Next update by: Monday, August 31, 2026 at 4:00 PM PDT
--How generic, vague, and unhelpful is it possible to be?
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u/t1noj 1d ago
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u/LordRoscoe10150 1d ago
Yup, I have the exact same thing on my personal Outlook account. My business M365 seems to be functioning normally however.
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u/as4p_ 23h ago
This is happening to me on one of my accounts but not on another. Pretty weird.
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u/abz786 Sr. Sysadmin 1d ago
not seeing any issues here...icloud to tenant, tenant to icloud, internal mail (west canada)
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u/MacKinnon22 1d ago
No issues here either (Eastern Canada)
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u/Dazzling_Style_1445 1d ago
Hotmail totally down for me - seems authentication-related. (Greater Toronto Area.) Lost access through Gmail app first, cannot sign in via browser either (error 500).
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u/binxalot 1d ago
All those thousands of H1Bs working at MS are frantically consulting ChatGPT for the answer on how to fix the problem only to be given answers that are outdated because all MS does now is move options and menus around and change icon faces.
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u/Bmw5464 1d ago
Too bad ChatGPT is down too! No wonder MS isn’t back up yet. They’re all busy signing up for Claude as we speak.
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u/Wanallo221 1d ago
MS Office: Why is everything down and how can we fix it?
Claude response: This is a great question and its worth us spending a bit of time explaining why it is a good question rather than just accepting it. Two really great points to discuss, along with one thing I would like to flag for your attention below....
MS Offices: On Fire.
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u/kbenoit19 1d ago
It looks like Microsoft still hasn't found the right prompt to fix this issue.
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u/Tap-Dat-Ash 1d ago
We're reexamining recent changes made to the service to determine why the authentication components aren't being deployed as expected. Additionally, we are exploring every avenue to safely restore the components, including potentially reverting an update the affected infrastructure recently received. We're performing additional tests to evaluate the best course of action moving forward.
So... nope.
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u/Cool-Initial793 23h ago
It's been 7 hours and I'm still unable to access Outlook, can't get anything synced on my phone app either. I can receive Teams calls but can't access Teams itself through Calendar or app. Like, c'mon, man. I love a day off but the cascade of shit I will need to catch up on when it's finally fixed ain't worth it at this point.
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u/SlowkayCoomer 1d ago
Haven't seen or heard of any issues related to this (SE US) but I went ahead and did a company-wide PSA just in case
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u/EvenRoyal9142 1d ago
I am in SE US and mine went down around 11am..weird, but not complaining yet..lol
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u/OperationMean3137 1d ago
Currently down in Pa, noticed it around 11:15am EST, users complaining that some messages didn't go through.
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u/IFarmZombies 1d ago
LOL
Details Title: Potential issues accessing mailboxes via one or more connection methods
User impact: Users may experience errors or failures when accessing their mailbox via one or more Exchange Online connection methods.
Final status: The investigation is complete and we've determined the service is healthy. A service incident didn't actually occur. This communication will expire in 24 hours.
This is the final update for the event.
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u/Bootles_fan_BD 1d ago
source? this appears to be from an NHS announcement regarding an incident in June, not the current outage
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u/mj2k2 1d ago
yup, down in germany since more than 2 hours
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u/mj2k2 1d ago
But interestingly other colleagues have no issues.
im using the outlook PWA and the browser version. Both saying:UTC Date: 2026-08-31T17:52:29.734Z Client Id: ---- Session Id: ---- Client Version: 20260821009.09 BootResult: fail Back Filled Errors: Unhandled Rejection: SyntaxError: JSON.parse: unexpected character at line 2 column 1 of the JSON data:undefined|undefined:undefined|undefined:undefined|undefined:undefined|Unhandled Rejection: SyntaxError: JSON.parse: unexpected character at line 2 column 1 of the JSON data:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|Unhandled Rejection: SyntaxError: JSON.parse: unexpected character at line 2 column 1 of the JSON data:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined err: System.Security.Cryptography.CryptographicException esrc: StartupData et: ServerError estack: w@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.491fdc82.js:1:806 165332/E/<@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.491fdc82.js:1:192762 st: 500 ehk: X-OWA-Error efe: --- ewsver: 15.21.360.13 reqid: --- cv: ----2
u/SecretAd6239 1d ago
No way! I'm getting the exact same error. Every time its like "Something went wrong" and shows this.
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u/Vivid_Mongoose_8964 1d ago
MS says this started around 11AM EST, however was anyone else seeing authentication issues around 7AM EST?
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u/Soulfight33 1d ago
I've heard a few end users report that, but haven't checked anything yet cuz no ticket, no bizkit
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u/Plenty-Raccoon-9492 23h ago
Still down for me in a portion of my emails (I monitor multiple accounts). 6pm CST.
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u/lnxrootxazz 22h ago
where are all the super agents when we really need them? Maybe Microsoft still struggles with the prompt??
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u/whatsforsupa IT Admin / Maintenance / Janitor 1d ago
Stuff is flowing right now, but very slowly. Microsoft has an official item for it on the status page now, that's a good start. Issue has been happening for ~20 minutes at this point.
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u/Bootles_fan_BD 1d ago
where do you see this? for me it still says "operational"
edit: seems to be in the admin center which I do not have access to on my edu account, if someone can post the info please do!
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u/Ikarus3426 1d ago
I haven't heard of any issues from my offices in the eastern half of the US, but I'll go ahead and start being paranoid about it now.
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u/overdosingOnPie1313 1d ago
Not seeing any deliverability issues here in North Central US. gmail to exo, exo to gmail.
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u/JustSayTomato 1d ago
Down for us in PNW area. I was having issues connecting in PowerShell, then a user reported they couldn’t connect to email, then we saw we couldn’t even open OWA. So we are seeing widespread issues.
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u/Weird-Diamond5970 1d ago
Glad to see it's not just me. I can't get into my Outlook at all, but everyone else at my office that I've talked to is fine. I wonder what the difference is.
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u/fang-island 1d ago
Currently down for my organization. It's been down since before noon. US-East.
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u/Dazzling_Meat1233 1d ago
Keep in mind y'all. the emails are failing not pending. Anything not going through will need to be resent
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u/Ok-Progress1398 1d ago
Can anyone explain why the https://status.cloud.microsoft/ page says nothing is wrong and all is working fine, but on x it says they are down?
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u/feebs_101 1d ago
Still down here in Alberta Canada. I just got back from vacation and have so much work to catch up on
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u/Comprehensive-Elk854 1d ago
Glad I’m not the only one with this issue! Thought I did something wrong at first!
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u/djmj1000 1d ago
I get following exception trying to send a mail via java application connecting successfully to mailbox using oauth2:
org.eclipse.angus.mail.smtp.SMTPSendFailedException: 432 4.2.0
STOREDRV.ClientSubmission.Exception:AgentGrayException.CryptographicException; Failed to process message due to a transient exception with message Non-agent gray exception caught in component 'Transport', function 'DoLocalSubmissionAsync' CryptographicException [Hostname=FR2P281MB0059.DEUP281.PROD.OUTLOOK.COM]
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u/larryseltzer 1d ago
I did too this morning. It must be more widespread than that, we had problems with non-Microsoft SaaS as well.
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u/HotMoosePants Jack of All Trades 1d ago
Yup down here. We have been out for 2 hours. Weirdly, I am still connected to Outlook.
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u/IronBatraz 1d ago
No worries guys. It is not a cyber attack. Just an expired certificate!? wtf... The cert with thumbprint 19F04B8A233DD9CE916F118056D224A1751729EA is expired.
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u/Playful-Farm-3156 1d ago
It's not working at work, but my college's spam campaigns are running just fine..both in Outlook
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u/El_Dorado_Tx 1d ago
Im at work I cant do shit right now with outlook - need it to get authenicator codes
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u/planedrop Sr. Sysadmin 1d ago
My favorite part was all of MSFT docs being down for like an hour today too lol
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u/Tap-Dat-Ash 1d ago
Microsoft now acknowledges this is an issue affecting multiple services. Onedrive/Sharepoint, Exchange online, Teams, Purview, Defender.
https://admin.cloud.microsoft/?#/servicehealth/:/alerts/MO1465074
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u/vpelka 1d ago
The half of my remote team that works from TN was never affected, but Texas and Florida staff are still down.
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u/International_Peak30 1d ago
So glad I beat my head off my desk for 3 hours before I came here lol
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u/Temporary-Agent6108 1d ago
I saw somewhere to reset the computer maybe about 30min into the outage. Was without email for about 1-2 hours, took a lunch, tried logging back in but I need a code that goes to where? I'll give you 2 guesses but you only need 1. Got to go home early...not a bad day for me.
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u/TrumpsFaceAnus 1d ago
I have a life-long friend with about 300lk or so users at his company and he just told me at lunch that the C levels had been on the fence about dropping M$.
Apparently,this day long outage was enough to make them pull the trigger.
I'm gonna bet this is gonna cost M$ some customers.
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u/marbak74 1d ago
I'm curious to where they will go and in what timeframe they want to migrate. They probably have almost everything hosted by Microsoft....
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u/Current-Composer6659 1d ago
This is bad! If you're running support, check Exchange message trace for your support mailbox email as a recipient. I'm able to at least see who submitted a ticket and what the subject line is so I can have the team follow up with them. Seems the emails are getting to Microsoft but aren't delivering to us until this is resolved. Really hope this gets fixed soon...
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u/ColdHold5174 1d ago
I have a ton of pending and undeliverable messages throwing this error:
Error: 550 5.6.200 STOREDRV.Deliver; message is treated as poison
I'll try to resend all messages from the time of the incident until the service is restored from the spam filter.
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u/Important_Subject760 1d ago
I feel as though there have been a ton more outages across platforms in the last year or so...what exactly are they doing to make these platforms so crappy now? Vibecoding everything?
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u/lawhopeful2021 1d ago
Still down 6pm in Central Florida!! Many of my coworkers seem to not be having issues. Anyone know why that would be?! I haven't been able to send or receive an email since 12pm. 😫
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u/ablazingrace23 1d ago
Glad I'm not the only one. I assumed outlook was being all fuckywucky again, but nope, outages all over google search :)
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u/punch0073735963 1d ago
I made the mistake of calling an 800 number. After an hour of clicking all over the place in admin I asked to be escalated and the next person told me to look at the system health and see there is a message about a large scale outage. And I couldn't understand a word they were saying.
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u/SnooBunnies9193 23h ago
I haven't been about to do anything in Outlook since about 12:15. It doesn't seem like everyone at my organization is affected, either. Which is annoying if I'm getting a bunch of emails I haven't seen yet and people think I'm not being responsive :(
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u/hj989 22h ago
has anyone -- who can now log in but couldn't before -- received emails during the outage? all of mine seem to have come in within the last 30 minutes but I'm assuming they were held back until the issue was resolved
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u/Cafe_Roaster 22h ago
It is working for me now but I only see emails delivered at 8AM (before outage started) and after 3:40PM (all times in PST). I dont know what I did not receive, lol.
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u/lepardstripes 10h ago
Had email delays with sending/receiving all day yesterday. Still continues today.
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u/WeirdKindofStrange 9h ago
One user unable to open attachments but forward the email to someone else and it works fine...
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u/f0rs4k3n Netadmin 4h ago
As of 1:50PM EDT - issue has been *slowly* resolving but I still have at least 1 user who is 100% down and cannot login to web, and new outlook no email since 12pm yesterday.
I have 2 users with email working but cannot open attachments (but forwarding the message the new recipient can no issues)
Microsoft put out a *NEW* incident and then promptly marked it "false positive - related to existing event"
27 hours and counting.






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u/MundaneUpVote 1d ago
A beautiful spike can be seen in the Downdetector