Tuesday, July 17, 2018

Exchange Transport Service stops after installing July 2018 Updates


After installing Windows security updates KB4338823 and KB4338818, Transport service on Exchange 2010 Sp3 servers will stop processing mail. When this article is written MS has confirm this as an issue (bug) and confirmed the patch is on its way. Both updates seem to be causing issues with TCP/IP stack which then affects Exchange application, transport issues.

As of now you should uninstall both updates and wait for MS to come up with another KB which KB4338823 and KB4338818 broke at the first time.


Oz Casey, Dedeal

Principal Systems Engineer

https://simplepowershell.blogspot.com/  (blog)

https://smtp25.blogspot.com/ (blog)

https://telnet25.wordpress.com/ (blog)

https://twitter.com/Message_Talk (Twitter)

Friday, June 8, 2018

Windows 2012 R2. The File Replication Service has Stopped after taking an assertion failure.

On the Domain controller event logs 13505 13555, 13506 present as shown below. NTFRS service could be in stopped state and re-starting NTFRS service will cause it to fail.

The issue most likely caused by corruption on the FRS Jet database or its Jet database log file

clip_image002

Cause: Corruption within NTFRS database or with logs.

Solution: Make sure NTFRS service is stopped.

1. Navigate to NTFRS folder directory

2. Rename folder to OLD-NTFRS

3. Re-start NTFRS Service

4. Observe the service and event logs

clip_image004

Oz Casey, Dedeal

Principal Systems Engineer

https://simplepowershell.blogspot.com/  (blog)

https://smtp25.blogspot.com/ (blog)

https://telnet25.wordpress.com/ (blog)

https://twitter.com/Message_Talk (Twitter)

Tuesday, May 1, 2018

Installing newest CU and dealing with .NET upgrade

Microsoft has dropped out Service pack model and start using cumulative updates (CU) while back.

You can read more about it on this article. If you are not on the latest CU , most of the last living on premises clients will not be wanting to implement latest CU on their on prem Exchange Servers, due to it is buggy reputation. Remember how many times newest CU broke Exchange more than it claimed to fix. You need to make sure .NET frame work is supported by the version of Exchange + CU version you have. Very recently, I have encounter interesting finding, what MS is recommending. Here is an example, you are running E2016 on prem with CU7 and wanting to go to CU8, and the latest CU version is CU9. MS did recommend CU8 has caused so many issues therefore CU9 is more applicable. At the time this article is written, there are no known major issues with CU9.

This year July the 1th upcoming CUs will require .NET 4.7.1, so you would think your upgrade logic will tell you install CU9 then upgrade .NET to 4.7.1. Since .NET 4.7.1 is not supported by CU7 installing it first would cause issues? I thought so as well. The recommended update path for those who are on E2016 & CU7 is Install .NET 4.7.1 first, reboot, then install CU9 (assuming you wanted to skip the buggy CU8)

I found this interesting and worth for mentioning about it. You can read similar verbiage on the .NET section of this article if you need MS backing.

image

https://technet.microsoft.com/en-us/library/ff728623(v=exchg.150).aspx

Oz Casey, Dedeal

Principal Systems Engineer

https://simplepowershell.blogspot.com/  (blog)

https://smtp25.blogspot.com/ (blog)

https://telnet25.wordpress.com/ (blog)

https://twitter.com/Message_Talk (Twitter)

Sunday, April 1, 2018

Enable Circular logging Lync Fabric logs


In this article we will talk about Lync Fabric logs and now to enable circular logging to keep your drive going out of space madness. If you are reading this article, most likely you ran into similar issues.

To enable circular logging, you will need to use following steps

1. log onto Lync FE server via Remote Desktop Protocol (RDP)

2. Make a right click on Windows PowerShell and select | Run as Administrator | press enter

3. Accept UAC warning by clicking yes

4. On the elevated PowerShell command prompt type following | and press enter

cd 'C:\ProgramData\Windows Fabric\Fabric\log\Traces'

image

Type following command and press | enter

Logman update trace FabricLeaseLayerTraces -f bincirc --cnf

6. From PowerShell type | Perfmon | press enter | navigate to following section within the Performance Monitor MMC.

7. Expand Data Collector Sets | Expand User Defined | Select Fabric Traces |

8. Make a right click on |Fabric Logs| and select | Stop|

image

9. Go back to | C:\ProgramData\Windows Fabric\Fabric\log\Traces | location

10. From command line type | Explorer .\ | press enter to open the log directory on GUI

image

11. Highlight all the existing ELT files and delete them.

12. Go back to Performance monitor snap in

13. This time select | Fabric Traces | on the right pane and make a right click select properties

14. Click File tab on top and locate Circular check box under log mode section

image

15. Make sure | Circular (requires a non-zero maximum file size) is selected, and is set to ENABLED.

16. If not enable it

image.

17. Make a right click on the | Fabric Traces | click on start

image

Note: You will need to perform same work on all the Lync FE Servers.

Oz Casey, Dedeal

Senior Systems Engineer
http://smtp25.blogspot.com/ (Blog)
http://telnet25.wordpress.com/ (Blog)
https://twitter.com/Message_Talk (Twitter)