Signing in over Remote Desktop requires a user to hold the " Allow log on through Remote Desktop Services " right and the " Access this computer from the network " right, and to be excluded from any matching Deny counterpart, since an explicit Deny always overrides an Allow granted through any other group membership. User1 is a member of Group2 (granted the Remote Desktop Services logon right) but is also a member of Group4, which is explicitly denied " Access this computer from the network " on Server4 -- that network-access denial blocks the RDP connection outright regardless of the Everyone-based network-access Allow or the RDS logon right, so User1 is denied. User2 belongs only to Group2: Group2 grants the RDS logon right, User2 is covered by the Everyone-based network-access Allow, and User2 is not a member of either Group3 or Group4, so neither Deny applies and User2 can sign in successfully. User3 is a member of Group3, which is explicitly denied " Allow log on through Remote Desktop Services " on Server4 -- that denial blocks the RDP logon right itself, so User3 cannot sign in regardless of network-access rights (and User3 is also in Group4, which independently denies network access as well). Therefore, only User2 can successfully sign in to Server4 using Remote Desktop.