To track users’ availability for meetings, Exchange Server and its clients use free/busy data—a mechanism that often causes angst for Exchange administrators.
Few administrators understand how clients publish free/busy data as users update their calendars, where Exchange stores the data, and what the data actually represents.
On the Integrations tab, select "Use Go To Meeting with" and then "Microsoft Outlook", as well as any other applications you would like integrated with Go To Meeting. If you don't see the Go To Meeting Toolbar Add-In, enable Add-Ins in Outlook. Whenever you'd like to host or join a session, simply use one of the following options to do so from within Outlook: Help.
You may need to close and restart any programs you selected for the Go To Meeting Toolbar to appear. Once you've added the Go To Meeting Toolbar from Preferences, open Microsoft Outlook. Depending on which version of Outlook you have, you may be able to access the Go To Meeting Toolbar from the Outlook ribbon, or you may need to first select Add-Ins from the Outlook ribbon to see the Go To Meeting menu items.
Consider the following process: So it is easy to understand why changes may not appear in the address book for cached-mode Outlook users for 24-48 hours after the change is actually made.
Note: a good way to verify whether an inconsistency is OAB-related or not is to use Outlook Web App to look up the person in the address book.
Get-Oab Virtual Directory | Select Server, Name, Poll Interval Server Name Poll Interval ------ ---- ------------ BR-EX2010-MB OAB (Default Web Site) 480 HO-EX2010-MB2 OAB (Default Web Site) 480 HO-EX2010-MB1 OAB (Default Web Site) 480 If you want to ensure that the OAB web-distribution points are updated before most Outlook users begin logging on in the morning then you would may need to change this polling interval.
Let’s look at two examples: Get-Oab Virtual Directory | Select Server, Name, Poll Interval Server Name Poll Interval ------ ---- ------------ BR-EX2010-MB OAB (Default Web Site) 120 HO-EX2010-MB2 OAB (Default Web Site) 120 HO-EX2010-MB1 OAB (Default Web Site) 120 The default OAB generation and distribution schedules work just fine for many organizations, but some will find they are not suitable and are causing support issues when changes are made that do not appear in the address book until 24-48 hours later.
And additional load from OAB generation and distribution cycles running more frequently may be undesirable to some administrators.
But, assuming you do want to improve this situation in your environment, here is what you can do about it.
The default schedule runs daily at 5am, and there are some other pre-configured schedules you can choose as well.
If none of those suit your needs you can choose a custom schedule and then customize it to run at one more times on each day.
Although Tech Net and the Exchange development team blog (at provide good information about free/busy data, this article aims to give you comprehensive coverage of the topic, bringing different sources of information together to illuminate one of the more esoteric parts of Exchange.