Exchange

How to fix the error: 550 5.7.520 Access denied, Your organization does not allow external forwarding

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I have often seen this error in scenarios with either multiple tenants or if an organization, has a need to do automatic forwarding of e-mails to specific recipients outside the organization (tenant). The error can be found during troubleshooting the message logs, on why a specific e-mail did not arrive at its destination, or if the end users got the error when their e-mail bounces. Remote Server returned ‘550 5.7.520 Access denied, Your organization does …

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Exchange Security Updates – May 2022

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Once again, we have some important Exchange Security Updates, released with the May 2022 Microsoft Updates. The latest Exchange Security Updates address vulnerabilities found in the following Exchange Servers: Exchange 2013 Exchange 2016 Exchange 2019 For more about the vulnerabilities, see the CVEs: CVE-2022-21978 | Microsoft Exchange Server Elevation of Privilege Vulnerability  The Security Update is available for the specific Cumulative Update level (CU) your Exchange is running, if you are not up-to-date, with the …

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The latest news on Exchange Server and the removal of the last Exchange Server

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Last week Microsoft announced a few major changes to the Exchange Server 2016 and 2019 versions. This post is meant as a small overview of the changes announced. Change to Exchange Hybrid and about keeping the last Exchange Server on-prem More about this in my post below Change to the Servicing Model of Exchange Server 2019 Instead of the quarterly CUs, Exchange moves to a cadence to two CUs per year Support for Windows Server …

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Exchange Security Updates – March 2022

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Once again, we have some important Exchange Security Updates, released with the March 2022 Microsoft Updates. The latest Exchange Security Updates addresses vulnerabilities found in the following Exchange Servers: Exchange 2013 Exchange 2016 Exchange 2019 More about the vulnerabilities, see the CVEs: CVE-2022-23277 | Microsoft Exchange Server Remote Code Execution Vulnerability  CVE-2022-24463 | Microsoft Exchange Server Spoofing  The Security Update is available for the specific Cumulative Update level (CU) your Exchange is running, if you are …

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Exchange Security Updates – Jan. 2022

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It’s time to update your Exchange Servers again – Microsoft has released another Exchange Security Updates, which addresses vulnerabilities found in the following Exchange Servers: Exchange 2013 Exchange 2016 Exchange 2019 More about the vulnerabilities, see the CVEs: CVE-2022-21846 | Microsoft Exchange Server Remote Code Execution Vulnerability  CVE-2022-21855 | Microsoft Exchange Server Remote Code Execution Vulnerability  CVE-2022-21969 | Microsoft Exchange Server Remote Code Execution Vulnerability The Security Update is available for the specific Cumulative Update level …

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