Sometimes when you install Exchange, you want to allow users to use their e-mail addresses as a login name. Most of the time UPN suffixes are not usefull. For example you have internal name for domain “company.corp”, but your e-mail addresses are “username@company.com“. You want to give an option for users to log into OWA using “username@company.com” instead of “company.corp\username”.
Most of the time I found at customers’ sites that they disable firewalls completely, because they don’t have time or they are just lazy to define exceptions in firewall settings. But this is not really good idea according to security.
These days I’m working on one RDS (Terminal Services before) farm and I’m playing with setting users’ environment as secure as possible, but also as usefull as possible. When I disabled access to Control Panel for all users with settings in GPO I found one issue. When I right-clicked on Desktop under normal user I could see following options:
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