Distribution Lists syncronizacion process and their update in GAL

Hi Experts,

I have to modify a few DLs in Exchange tomorrow, and last time I did perform this task, it took me a few days to see the new DLs in the GAL. How can I fix this issue? Will the change be effective immediately?

Is there any background synchronization process that needs to take place in order for the changes made to be replicated across the environments?  Can you please provide a quick explanation on this process?

How to prevent this issue in the future?

My exchange environment as per below:

2 CAS&HUB VMs Exchange 2010 SP3 one for each datacenter

2 MBX VMs Exchange 2010 SP3 in a DAG, one for each DC.

All VMs run Windows 2008 R2 latest updates

Outlook client version is mixed 2010, 2013

Thanks in advance
Jerry SeinfieldAsked:
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Stelian StanIT Services ManagerCommented:
To force the update open EMS and run the following commands:

Get-GlobalAddressList | update-GlobalAddressList
Get-AddressList | update-AddressList
Get-OfflineAddressBook | Update-OfflineAddressBook

Open in new window


On Outlook you might need to update the Offline Address Book by going to Send/ReceiveSend/Receive GroupsDownload Address Book

Using OWA you should be able to see the changes right away.
Jerry SeinfieldAuthor Commented:
Thanks for the information.

Can you please explain the process of replicating the information in Exchange every time that a DL is updated or created?
Jerry SeinfieldAuthor Commented:
I was wondering when the address book is updated on the Exchange side, so it’s available for the user to download in Outlook?

How the replication process works once the a DL is updated in the GAL?
Stelian StanIT Services ManagerCommented:
If you are using Outlook 2003 or 2007 you in "Cached Mode", the "Offline address book" gets updated every 24 hours. On the server side GAL only gets updated every 24 hours at 04:00 (by default). More details: http://www.petenetlive.com/KB/Article/0000775.htm

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