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Shutting down Exchange Server OWA Download Domains

You may have noticed that images are not visible on OWA after the Exchange Server March 2024 update. This is a problem reported by Microsoft in the Exchange Server March 2024 update, the DOWNLOAD Domains feature ...
Read moreConfiguring HSTS in Exchange Server

In addition to web-based access, Exchange Server also has external services. Therefore, the security of such services is extremely critical. HTTP Strict Transport Security (HSTS) plays a critical role in increasing this security. HSTS requires that only the secure HTTP protocol HTTPS be used to access Exchange Server's web services. Thus, it minimizes potential security threats and data breaches. HSTS automatically redirects insecure connection requests created by mistake or with malicious intent to HTTPS. In addition, in the event of SSL certificate errors, it ensures that the connection is directly disconnected without allowing users to make faulty connections.
Read moreExchange Online Starts Blocking and Reporting Email from Legacy Exchange Servers

Microsoft is taking a major step in addressing emails coming from old and outdated Exchange servers in its Exchange Online environment. In an announcement made on March 23, it was announced that emails coming from these servers will be checked ...
Read moreConfiguring Exchange Server 2019 TLS 12

In our previous article, we shared TLS information for Exchange Server. Securing Exchange Server 2019 with TLS Protocols – Cengiz YILMAZ | Sys Blog This article ...
Read moreSecuring Exchange Server 2019 with TLS Protocols

Exchange Server 2019 and TLS protocols, when combined, create a very powerful firewall. In this article, we have provided in-depth information on how to achieve this integration. Security can never be too much, so it is essential to use the latest security protocols and keep them updated.
Read moreWhat is Exchange Server, Office Online Server (OOS) and How to Install It?

Office Online Server is a server provided by Microsoft that allows users to view and edit Word, PowerPoint, Excel, and OneNote files through their web browsers. OOS, SharePoint Server, ...
Read moreExchange Server DAC Mode

Database Activation Coordination (DAC) mode in Exchange Server is known as a feature used to protect against “Split-Brain” scenarios that may arise from network problems. In this article, we will discuss the DAC Mode ...
Read moreExchange Server PreferenceMoveFrequency

Microsoft Exchange Server is an email server that meets the email and communication needs of many large organizations and is the most widely used and most stable application in the world compared to its competitors...
Read moreExchange Server Client Access Server Information Disclosure

If you are managing Microsoft Exchange Server for your organization, you should immediately perform regular updates released by Microsoft for your security. Large organizations usually perform Nessus scans within ...
Read moreExchange Server DAG Witness Failed State

In order to run Exchange Server in a DAG (Database Availability Group) structure, a Witness Server is needed. Usually, this is run on an Active Directory server, but a separate ...
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