Tag Archives: Exchange Online

Exchange Online: False SPAM flagging bug with GMail fixed

Posted on 2025-05-09 by guenni

[German]A small addendum from the beginning of May 2025 regarding Exchange Online. Since April 25, 2025, there has been a problem with a machine learning model incorrectly marking emails from Gmail accounts in Exchange Online as spam. According to Microsoft, … Continue reading →

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Exchange Online: "Send as" authorization on shared mailbox disrupted (April 10, 2025)

Posted on 2025-04-10 by guenni

[German]Microsoft is not having a good run at the moment – yesterday (April 9, 2025) the Exchange Admin Center was down worldwide for a few hours. Microsoft then rolled out a fix and everything seemed fine again. Today, I'm receiving … Continue reading →

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Microsoft 365: Mails are suddenly deleted after contacts deletion

Posted on 2025-03-31 by guenni

[German]I have a rather strange case here that a blog reader and administrator has encountered. In February 2025, he reported that contacts were being sporadically deleted in some of his users' Microsoft 365 accounts. Now the administrator notices that emails … Continue reading →

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Exchange Online Tenant Outbound Email Limits starts in April 2025

Posted on 2025-03-31 by guenni

[German]Microsoft is introducing outbound email limits for tenants to prevent misuse of Exchange Online by sending emails in bulk. This was announced by the Exchange team in February 2025. The limits were due to take effect in March 2025 and … Continue reading →

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Solution for no access to Microsoft 365 mail account via Samsung Mail app

Posted on 2025-03-29 by guenni

[German]There have been massive problems with Microsoft 365/Exchange Online since March 2025. And some readers and users are complaining that access to mailboxes via the Samsung Mail app is not working. A blog reader sent me a "spooky" solution to … Continue reading →

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EX1038119: Exchange Online quarantines mails (21.3.2025)

Posted on 2025-03-21 by guenni

[German]Short message for Exchange Online administrators. If no mails were delivered or messages ended up in quarantine as of today, March 21, 2025, it is not due to the tenant. Microsoft has posted a message in the Microsoft 365 Admin … Continue reading →

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Exchange Online outage locks out Outlook Web users (19.3.2025)

Posted on 2025-03-20 by guenni

[German]On March 19, 2025, there was probably another major Exchange Online outage, meaning that Outlook users were no longer able to access their Exchange Online mailboxes on the web.

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Exchange Online and MS365 problems due to vulnerability? (March 2025)

Posted on 2025-03-15 by guenni

[German]Microsoft has been struggling with disruptions to its Microsoft 365 services and Exchange Online since February 2025, but is keeping quiet about the cause. I have received information that a bug or vulnerability in Microsoft Exchange Online has led to … Continue reading →

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Exchange Online: New limits for Dynamic Distribution Groups (DDGs) from April 2025

Posted on 2025-03-15 by guenni

[German]Brief information for Exchange Online users and administrators. Microsoft will introduce new limits for Dynamic Distribution Groups (DDGs) from April 2025. This limits the number of Dynamic Distribution Groups (DDGs) that can be used per organization to 3,000.

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Outlook.com service disruption continues on March 13/14, 2025

Posted on 2025-03-14 by guenni

[German]There is no end to the disruption of the Microsoft cloud service outlook.com. Since March 1, 2025, the cloud services (Exchange Online, outlook.com, outlook.de etc.) have been experiencing repeated outages. The status is also disrupted on March 13 and 14, … Continue reading →

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