Exchange 2016: "There is a pending reboot from a previous installation of a Windows Server role or feature"

When I wanted to install CU11 for Exchange 2016, at the Prerequisites Check, I got the following error message: "There is a pending reboot from a previous installation of a Windows Server role or feature." I restarted the server twice, but still got the same message. After messing around with some registry keys and still no luck, I looked at the error message in more detail. The key part is "installation of a Windows Server role or feature". So this was not talking about a normal pending reboot Read more [...]

Windows: "The request was aborted: Could not create SSL/TLS secure channel"

I recently had a problem on an Office Web App Server (Windows Server 2012 R2). To show a document in Web View, it had to fetch it from another server via HTTPS. This failed. The ULS log showed: "The request was aborted: Could not create SSL/TLS secure channel" When I used Internet Explorer from the Office Web App Server, I could connect to the other server via HTTPS no problem. So the certificate was not the problem, it was trusted on the Office Web App Server. After hours of searching, I Read more [...]

Apple iOS: iPhone X Shortcuts for App Close, Restart and Other Stuff

I come from a Windows and physical keyboard world, so things that are simple in Windows seem very complicated or undoable in iOS. For example, shutting down an App (as simple as clicking the red X in the upper right corner of a window) didn’t seem possible in iOS. Find below some shortcuts that show how to do the “impossible”: Go to Standby: Press the Standby button shortly. Wake up from Standby: Press the Standby button shortly. Go to Home screen: Swipe up from the bottom. Read more [...]

Outlook: How to send S/MIME signed emails

Sending emails with a S/MIME signature has 2 advantages: It ensures that the sender is really who (s)he says (s)he is (prevents spoofing) The content of the email has not been changed or tampered with It is fairly easy to implement and it works with any recipient as most email clients (including web clients) support S/MIME. Even if a client would not support it, the recipient can still read the mail. First, you need to get an official certificate for your email address. There are different Read more [...]

Windows Server: Synchronize the Time via Internet (Command Line)

If you need to synchronize the time via the Internet on a Windows Server, it is best to configure this via command line. Find below the commands you need (Open CMD as Administrator):

w32tm /config /syncfromflags:manual /manualpeerlist:"pool.ntp.org" /reliable:YES /update

w32tm /config /update

w32tm /resync

"pool.ntp.org" is just an example, of course you can use other time servers.

Windows: Check Time Synchronization

If you are not sure if the time of your Windows Server or Client is synchronized properly or if you would like to know which is the time source, you can use the following command lines (Start cmd with Administrator privileges): net start w32time w32tm /resync w32tm /query /status You should see something like this: C:\Users\Administrator>w32tm /query /status Leap Indicator: 0(no warning) Stratum: 2 (secondary reference - syncd by (S)NTP) Precision: -6 (15.625ms per tick) Root Read more [...]

HP ILO: Update System ROM (BIOS) via ILO

You can use HP ILO to upgrade its own firmware, by uploading the firmware file (e.g. ilo4_255.bin) via ILO web console. This is straight forward and clear. But the ILO can do much more (but this is really a bit hidden in the web interface). From the help notes: The following firmware types can be updated from the Firmware Update page: iLO firmware System ROM (BIOS) Chassis firmware (SL and XL servers) Power Management Controller System Programmable Read more [...]

Windows Server 2016: How to force a certain Lock and Logon Screen

To avoid the picture on the Win Server 2016 Lock and Logon Screen, use the following procedure: Start the Group Policy Editor: gpedit.msc Go to Computer Configuration > Administrative Templates > Control Panel > Personalization Open Force a spcific default lock screen and logon image Enable it and set the path to the lock screen image to: C:\Windows\Web\Screen\img105.jpg Tick Turn off fun facts Click on OK to save the changes Read more [...]

Windows 10: Create a Desktop Shortcut to "Windows Update"

Since Windows 10 is not using Control Panel anymore for Windows Updates, it is not that simple to create a shortcut anymore. To create a shortcut to Windows Update, use the following procedure: Right-click on the Desktop and choose New > Shortcut In the "Location of the item" field, type ms-settings:windowsupdate Click Next In the "Name of the shortcut" field, type Windows Update Click on Finish While this works, it has one disadvantage. Clicking the shortcut always first Read more [...]

My experience with servers, networks and gadgets.