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On January 12, 2022, at ~01:49 am UTC, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue in which users in the UAE were experiencing mailbox access issues.
For IT professionals and system admins with Microsoft admin center access, Microsoft provided three issue #'s: EX313705, EX313731 and MO313750.
On November 10th, 2020 at ~5:15pm UTC, Microsoft reported an outage preventing some users from accessing Outlook.com and that additional information would be provided shortly.
Many confirmed they were unable to access Outlook from their mobile phones or laptops.
On October 1st at roughly ~6:00 am UTC, Microsoft reported an issue where users were accessing their Exchange Online accounts via Outlook on the Web.
The initial investigation indicated that the issue was primarily affecting users based in India. However, Microsoft then reported that once additional data was collected from the affected infrastructure it was evident that the issue was affecting users worldwide.
On July 15th, 2020 at ~ 4:30 pm UTC, Microsoft reported an issue that was affecting users’ ability to access Outlook.
They soon after reported that they were investigating a recently deployed update that they thought may be the source of the issue.
On July 9, 2020 at ~12:00 pm UTC Microsoft reported that they were investigating an issue where users in the UK are unable to access the Exchange Online service through the Outlook client.
Shortly after, several UK users began expressing their frustration with the recent increase in the number of outages users have experienced all over the world. Some expressed frustrations recommending Microsoft services to their clients and others insisted that the they were still experiencing issues hours later.
On June 25th, 2020 at ~2:00 pm UTC, Microsoft reported that they were investigating connectivity problems with Outlook in Europe and the United Kingdom.
Roughly an hour later, Microsoft reported that they were starting to see service restoration and were still monitoring the issue closely to ensure the issue was resolved.
On June 15th at ~1:00pm UTC, Microsoft reported an issue with Outlook client within Europe.
They soon after reported that the issue may be preventing users from connecting to Exchange online when using Outlook client and they were continuing to troubleshoot the issue.
On May 7th, 2020 at ~9:00pm UTC, Microsoft reported that they were deploying a solution to address an issue in which users may be experiencing repeated credential prompts within the Outlook client when using Classic Authentication.
On Tuesday April 21, 2020 at ~8:00am UTC, Microsoft reported that an issue with Outlook was delaying several users in Australia from sending mail for up to four hours.
Many Immediately began expressing their frustrations with the increased number of outages Office 365 users have recently been experiencing in the past month. While others reported that they were seeing issues go well beyond the 4 hours Microsoft reported.
On April 13th, 2020 at ~12:00am UTC, Microsoft reported that users in the Australia region could experience issues signing in or accessing Outlook.com.
Some users reported experiencing issues with other Microsoft services including Microsoft Teams. While others expressed frustrations with issues they’d been experiencing throughout the week and reported on the issues they were currently experiencing.