Abstract: For security reasons you wish to configure Windows Remote Management (WinRM) on your Windows 2012 R2 OS to use an SSL certificate.
Abstract: You got rights for an additional Exchange mailbox (e.g. your workmade), but when you try to send emails from this mailbox you got an error message.
Abstract: If an 3rd party environment (e.g. an Microsoft SQL Server) connect to an Microsoft Exchange Server you might see an error message like "The remote certificate is invalid according to the validation procedure" in the logfiles.
Abstract: You might come into a situation where a PC has SfB installed, but the user who is using this PC do not have a SfB login and therefore couldn´t login. The issue is now, that if he get an URL to join an SfB meeting URL (https://meet.contoso.com/john.smith/ZR2RJ141) the local and non configured SfB client will popup and the user isn´t able to join the meeting with the "Skype for Business Web App plug-in". How can that be solved?