Unfortunately, Exchange mailbox databases don’t shrink, and the last thing you want is your server running out of disk space. In this blog, we explore how to monitor your Exchange mailbox database size and available new mailbox space through PowerShell.

The post Using PowerShell to Get Exchange Mailbox Database Size and Available New Mailbox Space appeared first on Practical 365.

Microsoft announced that Exchange Online will block old Exchange Servers by throttling and then rejecting their inbound email into Exchange Online. The hope is that this tactic will convince those who operate unsupported versions of Exchange Server to upgrade and use supported software that isn't vulnerable to known attack vectors.

The post Microsoft’s Grand Plan to Force Upgrades of Unsupported Exchange Servers appeared first on Practical 365.

Among the latest set of patches released by Microsoft, a fix for CVE-2023-23397 is available to fix an NTLM vulnerability in Outlook for Windows clients. The update closes a hole where attackers can use specially formatted messages to force NTLM credentials to be sent outside the organization.

The post Outlook Elevation of Privilege Vulnerability Leaks Credentials via NTLM appeared first on Practical 365.

Exchange 2013 support ends on April 11, 2023. After that, Microsoft will not make fixes for security or functionality problems available to customers. It's time to make the decision to upgrade to Exchange 2019 or move to Exchange Online. Most organizations will find that Exchange Online is the right choice. Exchange 2019 is appropriate for organizations that have the right skills, experience, and investment to run a secure Exchange service.

The post What Now for Exchange 2013 Customers as End of Support Deadline Looms? appeared first on Practical 365.

In early December 2022, Rackspace had a major breach in their exchange environment that led to customers' mail data being stolen. This article explains what happened and what can be learned from this incident.

The post What We Can Learn from the Rackspace Breach appeared first on Practical 365.