Resolution
How to re-subscribe Edge Transport Server in Exchange 2010.Remove expired Edge Subscription on Hub Transport server
- Go to Hub Transport server
- Run Exchange Management Shell
- Execute cmdlet Get-EdgeSubscription | Remove-EdgeSubscription
- Open up an empty MMC console: Start > Run > mmc
- Select File > Add / Remove Snap-in
- Hit Add
- Select Certificates from the List of Snap-Ins, and hit Add
- Select Service Account on the Certificates Snap-In page, click Next
- Select Local Computer on the Select Computer page, click Next
- Select Microsoft Exchange ADAM from the list of services, click Finish
- Close the Add Snap-in dialog
- Navigate to Certifcates - Service > ADAM_MSExchange\Personal > Certificates
- You should see a single certificate here. Remove it.
Remove expired Edge Subscription on Edge server
- Go to Edge Transport server
- Run Exchange Management Shell
- Execute cmdlet Get-EdgeSubscription | Remove-EdgeSubscription
Create and export an Edge Subscription file.
- Go to the Edge Transport server
- Run the Exchange Management Shell
- Type the cmdlet New-EdgeSubscription -Filename "C:\EdgeSubscriptionInfo.xml"
Re-start the Microsoft Exchange ADAM service on Edge server
Copy the Edge Subscription file generated on Edge server to a Hub Transport server
Import the Edge Subscription file on Hub Transport server
- Go to Hub Transport server
- Run Exchange Management Shell
- Execute cmdlet New-EdgeSubscription -FileData ([byte[]]$(Get-Content -Path "C:\EdgeSubscriptionInfo.xml" -Encoding Byte -ReadCount 0))
5. Run Edge Synchronization
- Go to the Hub Transport server
- Run the Exchange Management Shell
- Run the Edge Synchronization by typing Start-EdgeSynchronization
The following picture demonstrates Edge Subscription process.

The following figure illustrates the EdgeSync synchronization process.

Additional information
Refer to the following articles for more information:
- Understanding Edge Subscriptions - http://technet.microsoft.com/en-us/library/aa997438.aspx
- Exchange Management Shell cmdlet New-EdgeSubscription - http://technet.microsoft.com/en-us/library/bb123800.aspx
- Import an Edge Subscription File to an Active Directory Site - http://technet.microsoft.com/en-us/library/aa995991.aspx