Microsoft has released Security Updates (SUs) for vulnerabilities found in:
Exchange Server 2013
Exchange Server 2016
Exchange Server 2019
SUs are available in a self-extracting auto-elev...
Updated Sep 18, 2023
Version 9.0
Blog Post
On Queue Viewer - can you confirm if this happened after Serialization signing feature was turned on or before? We had an issue with Exchange 2013 in November SU where Queue Viewer was failing with this error, and we should have addressed that in Jan SU. It is possible there is a problem with this but please clarify. Also - do you have a different version of Exchange in the org also? Can you try from E2019 queue viewer?
Hi,
I can confirm on 3 Exchange 2019 Servers (fairly default/clean HomeLab environment but HC script checked 😉 ) running on Windows Server 2019 (latest CU/Jan 2023 SU/OS Updates).
| Homelab servers | Serialization Signing | Result |
| SV-EXCH-01 | Server enabled | Cannot open Toolbox in Exchange Toolbox MMC snapin (hourglass on Toolbox) |
| SV-EXCH-02 | No | Can open Toolbox and connect Server1 queue |
| SV-EXCH-03 | No | Can open Toolbox and connect Server1 queue |
| Homelab servers | Serialization Signing | Result |
| SV-EXCH-01 | Server enabled | Cannot open Toolbox in Exchange Toolbox MMC snapin (hourglass on Toolbox) |
| SV-EXCH-02 | Server enabled | Cannot open Toolbox in Exchange Toolbox MMC snapin (hourglass on Toolbox) |
| SV-EXCH-03 | No | Can open Toolbox and connect Server1 and 2 queue |
[PS] C:\temp>Get-SettingOverride | Format-List Name,Reason,ComponentName,SectionName,Parameters,Server
Name : EnableSigningVerification
Reason : Enabling Signing Verification
ComponentName : Data
SectionName : EnableSerializationDataSigning
Parameters : {Enabled=true}
Server : {SV-EXCH-01}
Name : EnableSigningVerification SV-EXCH-02
Reason : Enabling Signing Verification
ComponentName : Data
SectionName : EnableSerializationDataSigning
Parameters : {Enabled=true}
Server : {SV-EXCH-02}