I got an error when tried to install Skype for Business Server 2015 KB3207506 using Skype for Business 2015 Update Installer. Checking the log file mentioned in the error window above gave me the following:
[9/5/2017 11:23:30 AM] Beginning installation of selected binaries...
[9/5/2017 11:23:30 AM] Executing command: msiexec.exe /update "C:\Users\admin\AppData\Local\Temp\Server.msp" /passive /norestart /l*vx "C:\Users\admin\AppData\Local\Temp\Server.msp-skype-fr-01-[2017-09-05][11-23-30]_log.txt"
[9/5/2017 11:24:09 AM] ERROR 1603: Server.msp had errors installing.
Opening the LCSSetup_Commands in the %userprofile%\appdata\temp folder reveals the following:
Install-CsDatabase : Command execution failed: Install-CsDatabase was unable
to find suitable drives for storing the database files. This is often due to
insufficient disk space; typically you should have at least 32 GB of free
space before attempting to create databases. However, there are other possible
reasons why this command could have failed. For more information, see
At line:1 char:2
+ & Install-CsDatabase -Update -DatabaseType Registrar -Verbose
+ CategoryInfo : InvalidOperation: (:) [Install-CsDatabase], Depl
+ FullyQualifiedErrorId : ProcessingFailed,Microsoft.Rtc.Management.Deploy
This time Microsoft hits bull’s eye! I had only 15Gb of free space on the system disk at that moment.
After I had extended the partition and run installer again it completed without any errors.