So I am unable to use the old GUI of Exchange 2007.To solve this issue, you need to do the following steps.
In the Information to download section, select Full Details and in the Address Book section, choose \Global Address List. **NOTE** Please read this section carefully, or your update will not work!!
In Cached Exchange Mode, Outlook 2007 & 2010 downloads a local copy of the Global Address List (GAL), but only updates it every 24 hours.
In order to reflect any changes or updates made to the Global Address List, you can force Outlook to download a new copy of the GAL.
For me, new colleagues are not showing up and the contact pictures aren’t displaying either.
They do for my colleague sitting next to me, so I don’t think it is a server misconfiguration or something like that.