Outlook and Outlook Modify the OAB update frequency in Outlook. I might have a problem with my Offline Address Book in Outlook. In Outlook and previous, it is recommended to leave the option “Full. Exchange Server administrators can optimize Offline Address Book generation and 8 hours by default); The OAB is downloaded to the Outlook client (at startup) list for an OAB polls for changes on a configurable interval.
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How often Outlook-client downloads an updated version of Offline Address Book ? Is it possible to tweak the frequency through registry?. With an offline address book, Outlook does not have to connect to the Server and earlier versions generate the offline address book files can also increase the frequency of the client offline address book downloads. Tabbed Editing and Browsing in Office, Just Like Chrome, Firefox, IE 8/9/ To change the update frequency for offline global address book in Outlook, (3) Only check the Download offline address book option in the.
For example, a staff member changes surnames and the help desk updates their Active Directory account with the new name. The staff member may notice that when the address book is viewed in Outlook their name remains unchanged, and may do so for hours. A common reason for this is the offline address book OAB schedules that are in place for the environment. Consider the following process: A change is made in Active Directory eg, the user's surname The OAB generation process occurs 5am daily by default The OAB file distribution process runs every 8 hours by default The OAB is downloaded to the Outlook client at startup So in real world conditions that process may actually look like this. At 9am the help desk changes the user's surname At 5am the next day the OAB generation process runs Up to 8 hours later ie as late as 1pm the OAB file distribution process runs The OAB is updated at next Outlook startup the day after that So it is easy to understand why changes may not appear in the address book for cached-mode Outlook users for 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. If OWA shows the correct details, and cached-mode Outlook does not, then it is likely an OAB-related issue whether that is simply a normal delay as shown above, or possibly an OAB problem of some kind.
All remote clients at this remote site download the Offline Address Book from the local Exchange public folder server.
This option is only useful in environments with a number of Exchange users that makes the investment of Exchange Servers in remote sites economically. One other solution is to use the throttling feature to prevent overloading an Exchange Server or the network. The throttling mechanism was first introduced in Exchange Server SP1.
This feature allows administrators to limit the network bandwidth used by offline address book downloads by setting a bandwidth threshold. After reading this article I hope you have a better understanding about Offline Address Books, the impact for your Exchange Organizations and your Outlook clients.
With some planning in mind you should successfully implementing Offline Address Books in your Exchange Organization.
Troubleshoot offline address book download issues http: Administering the Offline Address Book in Outlook http: If anyone still reads this article I'd suggest you have a look at the numerous iOS and Android addressbook apps out there.
They are many good ones which offer so much more than a standard addressbook. I use http: Your email address will not be published. Notify me of follow-up comments by email. Notify me of new posts by email. Learn about the latest security threats, system optimization tricks, and the hottest new technologies in the industry. Over 1,, fellow IT Pros are already on-board, don't be left out! TechGenix reaches millions of IT Professionals every month, and has set the standard for providing free technical content through its growing family of websites, empowering them with the answers and tools that are needed to set up, configure, maintain and enhance their networks.
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This can take several hours. At worst, it can take 24 hours. This variable will be referred to as "x.
This update can take several hours. This variable will be referred to as "y. It would be rare for a client to ever experience a hour delay or more unless there were some Active Directory or public folder replication issues. Note For Exchange Server and later versions, the default schedule is to process the OAB every 8 hours over a period of 1 hour.
OAB generation can run at different times based on resource availability. How can you tell when Outlook will try its next offline address book download? Unless you notice the last time that Outlook downloaded the offline address book, you may not know when Outlook is scheduled to try the next offline address book download.
No indicator in the Outlook user interface advises you of the offline address book download schedule.
Therefore, to manually force a download of the latest offline address book assuming one is available on the Exchange computer , use one of the following methods: Manually download the address book by following the steps appropriate for your versions of Outlook. Outlook and later versions: Click OK.
Outlook and earlier versions: If Outlook determines that either sequence ID is high as compared to the sequence ID that was downloaded, Outlook triggers the download. How frequently are the offline address book files generated on the Exchange computer? By default, Exchange Server and earlier versions generate the offline address book files every morning at For Exchange Server and later versions, the default schedule is to process the OAB every 8 hours over a period of 1 hour.
How is the offline address book updated on the server and on the client? Each day, the Exchange computer generates a full offline address book and a differential file from the previous day. The Exchange computer stores the differential file and the full file for the current day and stores only the differential files for the previous days. The following table outlines the process that Exchange and Outlook use to determine which offline address book files to download to the client.
Exchange Outlook Day Full offline address book sequence number Differential sequence number Client action Offline address book result on the client 0 0 No differential. Offline address book downloaded with sequence 2. Download differential sequence 3 and sequence 4 or offline address book sequence 4 if differential sequences 3 and 4 are greater than one-eighth the size of a full offline address book sequence 4.
Under what conditions will Outlook perform a full offline address book download? Outlook in cached mode will perform full offline address book download when the following conditions are true: There is no offline address book on the client computer.
This condition may occur if Outlook has not performed an initial complete synchronization. The total size of the differential files is greater than one-eighth the size of the full offline address book. In this case, Outlook downloads the full offline address book for better performance.
This condition may occur if there are lots of Active Directory objects that have a change to an attribute that is in the offline address book.
For example, phone numbers are updated with a new area code, departments are added to all users in Active Directory, and new address types are added. To modify the one-eighth rule, follow these steps.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. I understand how to increase the frequency of the OAB generation on the Exchange side but not for Outlook.
I understand it is possible to manually select "download address book" in Outlook but I have hundreds of users so I need something that will automate this.
Thanks very much for your help. Level Exchange Outlook 6. Windows Server 3. Who is Participating? Solutions Learn More Through Courses. Experts Exchange Solution brought to you by Enjoy your complimentary solution view. Get this solution by downloading an Individual license! Start your 7-day free trial. I wear a lot of hats LVL Julian Author Commented: Saakar Senior Technical Consultant Commented: