Outlook cached mode global address list not updating
You’ll have to rename them all to or, in the case of Outlook 2010 or Outlook 2013, rename the folder containing the oab-files to to reset the local Offline Address Book.Renaming just a single or some of the files will result in an OAB corruption. A benefit of manually deleting the oab-file is that before they are being re-downloaded, you are working with the Online Address Book.For instance, setting the value to 4 will trigger a full download when the incremental update is larger than one-fourth the size of the full OAB.When the value is set to 0, Outlook will use 16 to prevent a “divide by 0” error.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.This allows you to abort the update process when you are for instance on a slow or expensive connection.
You’ll find the following 6 oab-files in this location which make up the full Offline Address Book: If you are still using Outlook 2002/XP or previous, the file names won’t have a “u” in front of their name.
When you find things working correctly for you now but not anymore after the oab-file were redownloaded, you know that the issue is with the oab-files on the server and not on the client or the Address Book configuration in general.