E-Mail-Fälschung bei Exchange Online: Ghost-Sender betrifft viele Unternehmen

Nicht alle Unternehmenskunden von Microsofts Maildienst sind betroffen. Ein Prüfdienst schafft Klarheit und zeigt die möglichen Auswirkungen.

heise online

https://winbuzzer.com/2026/05/21/microsoft-alert-emails-abused-to-deliver-scam-links-xcxwbn/

Scammers are abusing Microsoft's trusted account-notification email channel to send spam or phishing links that can look like legitimate Microsoft alerts.

#MicrosoftAccount #Microsoft #Cybersecurity #Cybercrime #PhishingAttacks #MicrosoftSecurity #ExchangeOnline

🚨 Empresas estão perdendo acesso ao Microsoft 365 por motivos absurdamente simples:

🔐 senha perdida
📵 MFA sem backup
❌ Authenticator removido
👨🏻‍💻 antigo TI sumiu
🚫 conta bloqueada

E aí… ninguém acessa e-mail, Teams ou SharePoint.

Tenho ajudado empresas a recuperar e reorganizar esses ambientes com segurança. 👨🏻‍💻☁️

#Microsoft365 #EntraID #MFA #TI #SuporteTI #CyberSecurity #MicrosoftTeams #ExchangeOnline #SharePointOnline

Muita empresa ainda trata o Exchange Online como “só e-mail”.

E aí começam:
❌ phishing
❌ spam
❌ baixa produtividade
❌ problemas de LGPD
❌ retrabalho
❌ falta de governança

O Microsoft Exchange faz parte de uma plataforma corporativa completa de comunicação, segurança e colaboração.

A diferença entre “ter e-mail” e “ter estratégia” é enorme. 🚀

#Microsoft365 #ExchangeOnline #Outlook #LGPD #Ciberseguranca #MicrosoftExchange #CloudComputing #Tecnologia

Microsoft to Discontinue Legacy TLS Versions in Exchange Online by July 2026

Microsoft is putting the brakes on outdated security protocols, announcing that it'll start blocking legacy TLS 1.0 and 1.1 connections to Exchange Online in July 2026 - so it's time to upgrade and stay secure! This move marks the end of an era for older clients that still rely on these outdated protocols.

https://osintsights.com/microsoft-to-discontinue-legacy-tls-versions-in-exchange-online-by-july-2026?utm_source=mastodon&utm_medium=social

#ExchangeOnline #TransportLayerSecurity #Tls10 #Tls11 #Microsoft

Microsoft to Discontinue Legacy TLS Versions in Exchange Online by July 2026

Microsoft blocks legacy TLS 1.0 and 1.1 in Exchange Online by July 2026. Upgrade now to ensure secure connections and avoid disruptions. Learn more today.

OSINTSights

Exchange Online to Deprecate Legacy TLS for POP3 and IMAP4

Microsoft will start to refuse inbound IMAP4 and POP3 client connections using legacy TLS versions (1.0 and 1.1) in July 2026. The move is consistent with other projects to remove obsolete or insecure email protocols from Exchange Online to increase the overall security of the online email service. In this article, we examine some methods to understand the POP3 and IMAP4 usage within a tenant.

https://office365itpros.com/2026/04/29/legacy-tls-removal/
#ExchangeOnline #Microsoft365

Exchange Online to Deprecate Legacy TLS for POP3 and IMAP4

Microsoft will start to refuse IMAP4 and POP3 client connections using legacy TLS versions (1.0 and 1.1) in July 2026.

Office 365 for IT Pros

Microsoft to require TLS 1.2 or later starting July 2026 when connecting to Exchange Online

https://www.bleepingcomputer.com/news/microsoft/microsoft-to-deprecate-legacy-tls-in-exchange-online-starting-july/
- - -
Microsoft exigera TLS 1.2 ou ultérieur à compter de juillet 2026 lors des connexions à Exchange Online

// Article en anglais //

#Microsoft #Microsoft365 #ExchangeOnline

Microsoft to deprecate legacy TLS in Exchange Online starting July

Microsoft says it will start blocking legacy TLS connections for POP and IMAP email clients in Exchange Online starting in July 2026.

BleepingComputer

Microsoft Phases Out Legacy TLS in Exchange Online

Microsoft is phasing out support for outdated TLS versions (TLS 1.0 and TLS 1.1) for POP3 and IMAP4 connections to Exchange Online, starting July 2026, to boost security. From then on, only TLS 1.2 or later will be accepted, making older connections obsolete.

https://osintsights.com/microsoft-phases-out-legacy-tls-in-exchange-online?utm_source=mastodon&utm_medium=social

#TransportLayerSecurity #LegacyTlsDeprecation #ExchangeOnline #Microsoft #Tls10

Microsoft Phases Out Legacy TLS in Exchange Online

Learn how Microsoft's Exchange Online will phase out legacy TLS, requiring clients to use TLS 1.2 or later by July 2026, and prepare for a secure transition now.

OSINTSights

High Volume Email is Generally Available and Ready to Charge

On April 1, Microsoft announced the general availability for the High-Volume Email (HVE) solution together with details of the PAYG charges incurred to send email to internal recipients, which is all that HVE can do. Microsoft will enable HVE charging on June 1, 2026, Before then, you’ll need to create a billing policy and link it to a valid Azure subscription if you want to continue to use HVE.

https://office365itpros.com/2026/04/23/hve-ga-charging/
#ExchangeOnline #Microsoft365

High-Volume Email (HVE) is GA and Ready for Charging

On April 1, Microsoft announced the general availability for the High-Volume Email (HVE) solution together with details of the PAYG charges for sending email.

Office 365 for IT Pros