In Microsoft Exchange on-prem, there is a self-signed certificate called
Microsoft Exchange Server Auth Certificate
This not bound to any IIS web site, but still needed for authentication purposes. It is valid for 5 years. If the certificate has expired or is about to expire, you can renew it with the following procedure:
Start the Exchange Management Shell and type:
(Get-AuthConfig).CurrentCertificateThumbprint | Get-ExchangeCertificate | Format-List
This should show you the details of Read more [...]
In Microsoft Exchange on-prem, there is an internal certificate that is bound to the back-end web site. This certificate is self-signed and valid for 5 years. It is called
The subject of the certificate is the server name itself. Find below the procedure to renew this certificate. It does not matter if the certificate is already expired or still valid.
Start the Exchange Management Shell
Get the thumbprint of the current certificate:
Get-ExchangeCertificate | where Read more [...]
Starting a month ago, I occasionally get the following pop-up in Edge:
Download Microsoft Edge mobile app
Take your AI-powered copilot for the web on the go!
This is not a pop-up coming from a web site, but a built-in pop up from the browser itself.
So how can this and similar pop-ups from Microsoft be permanently disabled in Edge? Here you go:
In the browser bar, type edge://flags. This will present a list with browser experimental options.
Type Show feature and workflow recommendations Read more [...]
When you try to issue a new certificate on a Windows client, this might not work and you get the following error:
The certificate has invalid policy. 0x800b0113 (CERT_E_INVALID_POLICY)
The root cause of this is that the issuing CA has restricted the issuance policies you can use. If you have created a certificate template that uses a policy that is not allowed, you will get that error message.
There is a quick and dirty method to get rid of this error (but it also makes your CA a bit more Read more [...]
I had recently created a bootable USB disk for a Linux distro. After I did not use that anymore, I wanted to format it in my Windows 10 machine. But it was not recognized anymore. No drive letter, not visible in File Explorer.
In "Disk Management" it was visible, but I could not format it there either.
Using command line tool "Diskpart" did not help either as the "clean" command ended with an "Access Denied" error.
In the end, the folloing sequence of commands helped me in "Diskpart":
list Read more [...]
When a client of a server that is joined to a Windows Domain loses the trust relationship to its object in Active Directory, you normally get this error message, when you try to login:
The trust relationship between this workstation and the primary domain failed
What you then normally do is to un-join the computer from the domain and join it again.
The problem with with a Windows CA (Certificate Authority) Server is that you cannot un-join it from the domain. So that would mean you have to completely Read more [...]
If you do not want to or cannot use the SharePoint Upgrade Wizard, you can also use the command line to upgrade SharePoint. This is the exact syntax:
PSConfig.exe -cmd upgrade -inplace b2b -wait -cmd applicationcontent -install -cmd installfeatures -cmd secureresources -cmd services -install
Recently, I had the problem that a Robocopy script created folder with a space character at the end on the Windows NTFS file system. So for example
In File Explorer, I could not delete the folder, the error message said "Object does not exist". Also renaming the folder was not possible.
The onyl solution was to go to a CMD box and issue the command
rd /s "\\?\D:\bad\folder\path "
Just answer "y* when you are asked if you really want to delete the folder.
To avoid the typical picture on the background of your desktop, use the following procedure to force a solid blue color as background:
Start the Group Policy Editor: gpedit.msc
Go to User Configuration > Administrative Templates > Desktop > Desktop
Open Desktop Wallpaper
Enable it and set the Wallpaper Name to:
Click on OK to save the changes
While you could also just right-click on the desktop and choose Personalize and set a Read more [...]
Sometimes, if you can't use the graphical Event Viewer (e.g. on Windows Server Core), it is handy to list the latest Event Viewer entries via Powershell:
Get-EventLog System -Newest 10 | fl
Get-EventLog Application -Newest 10 | fl
This is also much quicker than starting Event Viewer.