Microsoft Exchange and Active Directory Blog
High Volume E-Mail (HVE) is an Exchange Online service that supports the sending of bulk mails and is not subject to the limits of a normal user mailbox. High Volume E-Mail is currently still in the public preview, but can already be used free of charge as part of the Exchange Online or Microsoft 365 subscription, a license for the HVE account is ... Read more
If users complain that emails cannot be forwarded automatically, Exchange Online can be configured accordingly. Exchange Online prevents the automatic forwarding of emails via Outlook rule, users who have created a corresponding rule receive the following undeliverable message from Exchange Online: The automatic forwarding of emails poses a security and data protection risk, therefore ... Read more
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
Sometimes it may be necessary to install the Exchange Online Shell on an older operating system, for example if an older Exchange Server version is to be migrated to Exchange Online or Microsoft 365. However, when trying to install the shell, an error may occur where the error message is not entirely clear. The following error message can occur, ... Read more
As a side note, new limits will be introduced in Exchange Online and therefore also in Office 365 from 01.06.2018. Specifically, these are new limits for authenticated SMTP connections (SMTP Authenticated submission): Sent mails will be saved in the "Sent items" folder of the mailbox Only three simultaneous connections per mailbox are now permitted Depending on the configuration ... Read more
Brief instructions on how to block entire domains using the Office 365 AntiSPAM feature. Log in to the Office 365 portal (Sign in to Office 365) and click on "Exchange" Now click on the "Spam filter" tab under "Protection" and edit the "Default" policy or create a new policy In the new window under the item ... Read more
