A systems administrator has determined that there are several users experiencing problems within two offices that have recently merged into one OU. Users within one of these offices are not having…

Group Policy Objects (GPOs) are linked at the OU level and inherited by child OUs and their objects. When two offices merge into a single OU, the GPOs that previously applied to each office may conflict, override, or fail to apply correctly to users from one of the source offices. Settings such as drive mappings, software restrictions, or logon scripts controlled by GPO are the most common source of selective user issues after an OU restructure.

Firewall policy misconfigurations typically affect network-level connectivity for all users uniformly rather than producing selective issues tied to which office a user originally belonged to.

File permission issues would manifest as specific 'Access Denied' errors on particular resources, not as general widespread problems affecting an entire group of users.

'Port permissions' is not a standard Windows or Active Directory configuration concept and would not selectively affect users based on OU membership.