outlook LDAP address book email

There are two Oxford-based email systems currently in use by Physics staff, the campus Nexus system and the Physics department exchange system. Each service has its own email `address book` and these are different so it is important to know how best to use these as the department is due to migrate to Nexus during the summer of 2017. The nexus directory holds entries for all staff and students across the campus whilst the physics system only holds entries for Physics staff, students and visitors.