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Hello,
I have a problem with Exchange Queue Viewer. It works until it is refreshed. After that I get an error: 
Then the Queue Viewer does not display any information.
Exchagne on prem in version: 15.2 nuild 986.5
Queue Viewer version: 15.02.0986.005
Reinstalling Queue Viewer does not help.
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Hi @Michał Jarosz ,
Also curious about how you managed to "reinstall queue viewer. Do you mean only Exchange Management tools are installed on the machine where the issue occurs? What's the version of the operating system?
Besides, please try opening the Exchange Management Shell, run the Get-Queue cmdlet and see if it can work as expected.
Hi @Michał Jarosz ,
Just checking in to see how things are going on with this issue. Have you managed to get the Queue Viewer working again? If you need further assistance on this, please feel free to post back.
I uninstalled EMT and installed it again. EMT is on a different virtual machine than Exchange Servers.
Exchange Management Shell works. Get-queue returns correct data with no warnings/errors.
EMT is installed on Windows Server 2019.
How did you reinstall Queue Viewer? Not sure what that means
If this is the Exchange Management tools Only installation on another server, ensure the CU and Security updates installed match what is installed on the Exchange Server
Exchange Management Tools are installed on a different virtual machine than the Exchange servers themselves. It (EMT) was uninstalled by me and installed one again. As I wrote without success.
Virtual machine with EMT and virtual machines with Exchange Servers have the same updates, the same CU, the same OS version (Windows Server 2019).
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I would start by getting them on the latest CU/RU if they are not, and it's likely to go away, secondly 2010 is end of mainstream support, there are a couple of years left on extended support, I would update their box then focus on the move forward.
Hes not using Exchange 2010. That build is 2019 CU11
Exchange 2010 is also out of extended support as well.