Hello, I use Exchange 2007 and I follow the below link to create edgesubscription: http://searchexchange.techtarget.com/generic/0,295582,sid43_gci1262396,00.html After I did the manipulation I checked the edgesubcription on the edge: I ran the below command yesterday: [PS] C:\>Get-EdgeSubscription | fl Site : Domain : company.com IsValid : True OriginatingServer : localhost Name : EDGE01 WhenChanged : 08/09/2010 17:00:29 WhenCreated : 26/03/2008 13:13:37 and ran that one few mn ago: [PS] C:\>Get-EdgeSubscription | fl Site : Domain : company.com IsValid : True OriginatingServer : localhost Name : EDGE01 WhenChanged : 09/09/2010 09:28:48 WhenCreated : 26/03/2008 13:13:37 I wonder why the WhenChanged has changed and would like to know when it would expired. Many thanks, Graig

Daily it's used to sync between servers.If u see tomorrow u can see date of tomorrow. -bpara

Okay thanks. But how do I know when it will be expired?

Hi Graiggoriz, From the Technet: EdgeSync synchronization occurs at the following intervals: 1,Configuration Data is scheduled to be synchronized at one hour intervals. 2,Recipient Data is scheduled to be synchronized at four hour intervals. 3,Topology Data is reloaded every 5 minutes. Understanding Edge Subscriptions http://technet.microsoft.com/en-us/library/aa997438(EXCHG.80).aspx So if you modify the configuration, the WhenChanged will be changed. And if you run the cmdlet Start-EdgeSynchronization on the HUB, the value will be changed immediately. You can find ralated Event when it will be expired in the Event Viewer. eg: The internal transport certificate has expired http://technet.microsoft.com/en-us/library/bb218165(EXCHG.80).aspx Frank Wang