Tag Archives: Exchange Online

Exchange Online blocks suddenly mails from on-premises Exchange servers

[German]A quick question for Exchange Online administrators. A reader reports problems with the delivery of mails that are delivered from on-premises Exchange servers. Since the November 2023 patchday, these are supposed to be moved directly to quarantine after acceptance. The … Continue reading

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Exchange Online: Missing confirmations for rooms bookings

[German]Currently users are facing many issues with Exchange Online. German blog reader Georg emailed me yesterday (October 25, 2023) about an annoying bug in Exchange Online: They don't get any confirmations / rejections sent for rooms bookings in Exchange Online … Continue reading

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How to find weak passwords in Active Directory and eliminate them with PowerShell

[Sponsored Post]Weak or compromised passwords are a known gateway for attackers. If you are able to identify which users in Active Directory (AD) are threatened by this, then PowerShell can help to remedy it. However, PowerShell scripts cannot eliminate basic AD deficits, other tools are needed for this. More ...

Exchange Online show foreign address lists (GAL) – a GDPR violation

[German]A reader pointed out to me a strange and dubious behavior of Exchange Online. It has been observed that users are offered global address lists (GAL) from other tenants as soon as people try to fill out the To field … Continue reading

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Exchange Online: Microsoft deaktiviert Spam-Regel, die alles als Junk-Mail betrachtet hat (EX682041)

[German]Exchange Online administrators may have received a number of copies of their users' outgoing emails classified as spam in the last few hours. The cause was a spam rule causing false-positive spam notifications. Microsoft has confirmed the whole thing as … Continue reading

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Exchange Online: Incident EX680695 (Oct. 11, 2023)

As of October 11, 2023, Exchange Online has experienced a severe mail traffic disruption. Several readers reported problems receiving emails from external email addresses. Microsoft has confirmed the incident and claims to have already rolled out a fix. Spoiler: They … Continue reading

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Exchange Online: Retirement of Exchange Web Services (EWS) after October 1, 2026

[German]Note to Exchange Online administrators. Microsoft has just announced in a blog post that it will discontinue Exchange Web Services (EWS) on October 1, 2026. All communication will then have to be done via Microsoft Graph from that date. So … Continue reading

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Reminder: Remote PowerShell on Exchange Online will be disabled

[German]Small reminder for administrators who maintain Microsoft's Exchange Online and still work with Remote PowerShell (RPS). In the meantime, Microsoft has deactivated RPS for new instances and this function can no longer be activated. In a few weeks, support for … Continue reading

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Allegedly malicious notifications from teams through Defender ZAP

[German]I would like to ask the administrators among the readership if anyone else is experiencing the effect mentioned here. An administrator contacted me because he has been getting reports of supposedly corrupt notifications from Teams for days. In use is … Continue reading

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Exchange Online blocked emails (June 18, 2023)

[German]Today, July 18, 2023, Microsoft's Exchange Online cloud service appears to have been experiencing a [partial] glitch since morning (8 a.m. UTM). German blog readers reported that emails are being blocked. There are various references to issues on 3rd party … Continue reading

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Exchange Online: Client Credential Flow for SMTP AUTH available (July 2023)

[German]Quick addendum from this week: Microsoft's Exchange team has already announced the availability of Client Credential Flow (CCF) for SMTP AUTH in Exchange Online on July 10, 2023. Client Credential Flow (CCF) for SMTP AUTH enables applications to use modern … Continue reading

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