Exchange Center

ENow Software's Exchange blog built by Microsoft MVPs for IT/Sys Admins.

Posts by

Jaap Wesselius

Jaap is a Microsoft MVP for Office Apps and Services. Jaap is an independent consultant, primarily focusing on Exchange server, Skype for Business and Office 365.

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Date Bug in Exchange Causes Headaches

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Jaap Wesselius

Happy New Year! With the recent change to the new year, a nasty bug similar to the Y2K bug (Y2K22?) appeared in Exchange 2016 and Exchange 2019. On 01/01/2022 at 0:00 hour UTC a date conversion failed inside the product, causing the anti-malware agent to fail. As a result, the Exchange transport service was no longer able to process email and mail started to queue on the Exchange server. This also happens on Exchange 2013, but email is not queued and therefore the issue is not directly visible.

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Autodiscover Protocol Vulnerabilities

Autodiscover Vulnerability FUD or Not?

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Jaap Wesselius

Social media exploded when an ISV who specializes in security released a blogpost about a vulnerability they found in Autodiscover, the protocol that is used by mailclients to discover Exchange configuration and configure themselves. Outlook is the client that uses Autodiscover the most, but mobile clients and third party applications can use Autodiscover as well.

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Decommissioning Your Last Exchange Server

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Jaap Wesselius

Decommissioning the last Exchange server

When you are in an Exchange hybrid configuration and you have migrated the last Mailbox to Office 365, you might wonder what to do with the last (couple of) Exchange server that is still running on-premises. Can you decommission your last Exchange server because all your Mailboxes are in the cloud? From a supportability point of view the answer is still “No, you can’t decommission the last Exchange server because you need it for management purposes” and most customers think this is disappointing. Let me explain why we still need this last Exchange server.

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