troubleshooting tips

Troubleshooting tips


Install-Module fails with Source Location https://www.powershellgallery.com/api/v2/package/xxx is not valid   Recently updated !

The use of Install-Module and Update-Module has become a routine task for many Powershell administrators these days. Lately if you applied those commands, you may have received warnings and errors even from well-known sources. Messages include: If you look at the resource or the web site, the package stills exists […]


Firefox displays SSL Error: SEC_ERROR_INADEQUATE_KEY_USAGE when using self-signed certificate

When using self-signed certificates, and accessing your web contents with the Firefox browser, you may get a strange error message SEC_ERROR_INADEQUATE_KEY_USAGE This may happen in self hosted instances of YunoHost for example. Whereas the contents is properly displayed in all other browsers, you cannot add any exception in Firefox and […]


Free Disk space on Windows drive

Starting with Windows 2012 (R2), it is no longer necessary to install the desktop experience to remove the different file versions left update after update. The following command can be used:

Options used here are: StartComponentCleanup: removes superseded and unused system files from a system ResetBase: all superseded versions […]


Windows 2016 Remote Desktop cannot verify the identity

When connecting using RDP to a Windows 2016 server, you may receive an error message which seems clueless to you: Windows 2016 Remote Desktop cannot verify the identity of the remote computer because there is a time or date difference between your computer and the remote computer. When you manage […]


RPC process diagram

Error 1753: no more endpoints in AD Replication

When you see Error 1753: no more endpoints in AD Replication,¬† the common mistake is to think about firewall or TCP/IP connectivity issues. The message “Error 1753: There are no more endpoints available from the endpoint mapper” does not mean that you cannot connect at all. It is quite the […]


How to have a member server stick to one specific domain controller?

In case of troubleshooting or temporary issue, you may want to be sure that a given member server always authenticate against one specific domain controller. For this, you may want to combine two tools: The “time-to-live” (TTL) value for the validity of the discovered domain controller The ability to specifically […]