AD FS offers a large number of predefined claim descriptions. In case you need some custom claims, e.g. cost center number, you simply need to add a new claim description at the AD FS console.
If you are using an outbound proxy for connecting to the Internet, the following setting in the C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\machine.config file must be added for the installation wizard and Azure AD Connect sync to be able to connect to the Internet and Azure AD. This text must be entered at the bottom of the file but before the closing configuration tag. In this code, represents the actual proxy IP address or host name and PROXYPORT represents the port the proxy server is listening.
To set a requirement complex password for all users in O365 do not having one, execute the following PS lines.
In my Outlook I found a shared Folder with missconfigured folder name and regional settings.