In this guide, the relevant timings are explained and instructions are given in how you can directly force an update and resync, which can be very handy when troubleshooting or when you work in an Exchange environment which sees a lot of user mailbox mutations.This means that in the worst possible scenario, an update to the Address Book won’t become available to the user until 48 hours after the change.The only changes we've made is we recently upgraded all domain controllers from 2003 to 2008 R2 and raised the forest/domain functional levels. When you have Cached Exchange Mode enabled, Outlook by will by default cache the main Global Address List as well.After you create an OAB or modify OAB settings, the changes aren't available to users until the OAB generation (OABGen) process has completed.For additional management tasks related to OABs, see Offline address book procedures.After all this, the changes will appear in the GAL.
In a later section, it is explained how to modify this.
This situation however is extremely rare since the default maintenance time on Exchange is at AM and updates and downloads are usually performed during working hours.
Even though Outlook is the last in the chain, it is often the first level where the troubleshooting takes place as usually this is where the request is coming from.
For Example: On the Mail Server under this folder structure exists: C:\Program Files\Microsoft\Exchange Server\V14\Exchange OAB\ig and nothing else.
I believe this directory should have the same contents of the GUID Folder with the LZX files as the Mail Server that generated the OAB.
And since this website’s main focus is on Outlook, it makes sense to start with Outlook as well ;-).