Symptoms
The Queue Viewer tool stops responding and returns an unhandled BlockedDeserializeTypeException when it tries to connect to any transport queue in Microsoft Exchange Server 2013.
Consider the following scenario:
-
You install KB5019758 (November 2022 security update) on any Exchange Server 2013-based server.
-
You navigate to the Exchange Toolbox and open the Queue Viewer.
-
You select any queue that’s displayed in the Viewer.
-
You select View Messages.
In this scenario, the following issues occur:
-
The Toolbox window does not open the selected queue. Instead, it displays a call stack and the following error message
"Microsoft Exchange Critical Error."
-
When you double a queue, the following error message is displayed:
"MMC has detected an Error in a snap-in and will unload it."
Resolution
To fix this issue, install the following security update:
