This is a 3 part question.
My organization has a single exchange 2003 server. A few weeks ago I created some mail-enabled distribution groups using ADUC and those lists show up in the GAL on my Outlook 2010 client. This morning, I created several more groups, and modified the name of some of the existing groups. After I did that, I went into ESM and rebuilt the OAB, waited about 15 minutes and then redownloaded the OAB in Outlook, but those changes are not showing up when I look at the GAL.
Question 1 is what else do I need to do to manually sync the changes so that I can see them in Outlook?
Question 2 - by default the OAB updates once per day. If I want it to update more frequently, can someone give me an idea of how much load that would add to the server? When you rebuild the list, it warns you that it can take a while to completely rebuild it, but our organization is small (less than 150 mailboxes). I was thinking about having the OAB update hourly, would that be a bad idea?
Question 3 - if the server updates the OAB more frequently, will Outlook automatically download it, or is there also an interval for downloading a new OAB in Outlook? In other words, if the OAB is updated every hour, will Outlook automatically download it every hour if there have been changes?