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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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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Exchange security patches history of the year 2021

by A.K.common, Microsoft Exchange Server, securityPosted on No Comments

On this site you can find important links for exchange patching: March 2021 Quarterly Exchange Updates (and the nightmare began) Released: March 2021 Quarterly Exchange Updates – Microsoft Tech Community March 2021 HAFNIUM Released: March 2021 Exchange Server Security Updates – Microsoft Tech Community April 2021 Exchange Security Updates Released: April 2021 Exchange Server Security …

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Exchange Clean Logs ETL 2013/2016/2019 with detailed logging

by A.K.common, Microsoft Exchange ServerPosted on No Comments

In old fashoined exchange onpremises installations, lot of people face an issue exchange does not accept new mails, because of lack of ressources. So how to cleanup the drive where exchange is installed? Some days ago the good old technet gallery offered a small script to manage this task. But now the technet gallery (R.I.P) …

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Exchange 2010 / 2013 / 2016 DAG maintenance tool

by A.K.common, Microsoft Exchange ServerPosted on 2 Comments

Some days ago a teammate had to schedule a maintenance for two Exchange Server in DAG mode. I said there had been a great tool putting one of this servers in maintenance. Just googling some minutes, but did not find any project in github anymore. Remember the useful tool? After some time I found the …

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