Urgent Exchange 2019/2016/2013 Security Patch November 2021 KB5007409

by A.K.common, Microsoft Exchange Server, securityPosted on 4 Comments

Another very important security patch is enrolled the last 24 hours for Exchange 2013/2016/2019. See CVE-2021-42321. This CVE is also known als Remote Code Execution vulnerability. If you want to know some more information about this Exchange Update and the vulnerabilities see this link: https://techcommunity.microsoft.com/t5/exchange-team-blog/released-november-2021-exchange-server-security-updates/ba-p/2933169 Just choose your exchange version and download this patch from …

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it-koehler.com hacked! What to do next? Plugin to blame!

by A.K.common, securityPosted on No Comments

Some days ago I got a friendly mail from my hosting company Host Europe, they found some malware inside my wordpress database (not in my blog, but the regular website it-koehler.com. Because of the malicious link they are going to block my complete website (including blog.it-koehler.com). See the mail: I thought: “Holy sh… whats going …

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Exchange Online: see mailboxsize and added mobile devices with PowerShell

by A.K.common, hybrid environments office 365, Microsoft Exchange Server, PowershellPosted on No Comments

Lot of customers ask me if it is possible to get a statistic of mailbox size in Exchange Online. I say, of course it’s possible with PowerShell. Some time ago I created a short script to get sizes as output to shell. Not that usable. The last days I spent some time to create a …

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