Hi Part of the user account attributes are updating in Outlook 2010 (cached mode) but some aren't.
For example City is not updating but organisation "manager" or "direct reports" are.
By default OAB is a point in time snapshot of global address list and it is used as cached source of information about Exchange recipients properties.
OAB is stored on Exchange servers (see my previous article https://ficility.net/2013/03/04/oab-differences-between-exchange-2010-and-exchange-2013-in-brief/) and downloaded to client once Outlook is configured in Cached mode.
The following registry settings can be used to disable the Global Address List from being included in the cache.
It also creates a faster response time of the Outlook client (especially when opening large attachments) and gives the ability to work offline.
It does this by creating a local copy of the mailbox and synchronising the updates as needed.
Unfortunately, by default Outlook cached mode also includes the Global Address List.
This can mean that new accounts or distribution lists are not available to all clients straight away.