Microsoft Exchange and Active Directory Blog
On July 14, 2023, Microsoft reported a security incident that affected Exchange Online and Outlook.com customers. According to Microsoft, the Chinese hacker group Storm-0558 managed to get their hands on a private SIgnature key for generating access tokens for Exchange Online and Outlook.com. With the private key, the hackers were able to generate access tokens for ... Read more
Microsoft announced some time ago that Basic-Auth (standard authentication) will be deactivated in all tenants for the MAPIoverHTTP, EWS, POP, IMAP and ActiveSync protocols in Exchange Online from October 1, 2022. From October 1, 2022, it will therefore no longer be possible to use Basic-Auth (transmission of user name and password via HTTPS) in Exchange Online for ... Read more
During a migration from Exchange onPrem to Microsoft 365, the error occurred that users synchronized via AADConnect could not log in to some services (such as Exchange Online and Office Portal) (HTTP 500 error). However, it was possible to log in to Teams and OneDrive without any problems. Logging in via Edge and Internet Explorer was also possible on ... Read more
When routing emails in Exchange Hybrid mode, the following error may occur between Exchange on-prem and Microsoft 365 mailboxes when sending mails from a local mailbox (or an external sender) to an M365 mailbox: Remote Server returned '554 5.4.108 SMTPSEND.DNS.MxLoopback; DNS records for the next hop domain are configured in a loop -> ... Read more
I have just uploaded version 3.8 (code name Leslie). This is the first version that has a "code name" because Leslie (the Leslie) was kind enough to dig through the many lines of PowerShell code and found and reported some bugs. The following bug fixes are included in version 3.8: updatereport.ps1: The module showed the ... Read more
Does anyone remember the call for support for a proposal by Jeff Guillet regarding centrally managed Outlook signatures? I reported on Jeff's proposal in March 2018 and asked for support for the proposal. A total of 8754 votes were cast in favor of the proposal and in September 2019 the answer came that ... Read more
If user accounts are synchronized using Azure AD Connect, no Microsoft 365 (formerly Office 365) license is assigned by default. In the default setting, a corresponding license must therefore be assigned manually so that the users can use the Microsoft 365 services. However, this process can also be carried out automatically. So that users are automatically assigned a Microsoft ... Read more
The Microsoft Office 365 Developer Program is not new, but perhaps some of you are not yet familiar with it. So if you want to try out Office 365, or even develop your own applications for or with Office 365, the Developer Program gives you 25 E3 plans for 90 days free of charge (see note at the end of the ... Read more
Three detailed articles on Exchange Server and TLS 1.2 have been published on the Exchange Team Blog. The articles are not only very worth reading, but also have an important background: From October 2018, Office 365 will require TLS 1.2 and will not accept mails from servers that only support TLS 1.0 or TLS 1.1. In plain language ... Read more
This is the fourth part of the series "Exchange 2016 Hybrid Mode with Office 365". In this part, Exchange Hybrid Mode is activated and initial tests are carried out. Here are the links to the previous articles: Exchange 2016: Hybrid Mode with Office 365 (Part 1) Exchange 2016: Hybrid Mode with Office 365 (Part 2) Exchange 2016: ... Read more
