If you are using the built-in scripts to clone Edge Transport configuration in Exchange Server 2013 you may encounter this following error when running ImportEdgeConfig.ps1 on the target server.
WARNING: An unexpected error has occurred and a Watson dump is being generated: Value cannot be null.
Parameter Name: collection
Importing Edge configuration information Failed.
Reason: Value cannot be null.
Parameter name: collection
The issue can be seen in the figure below, and for this Tutorial we are using Exchange Server 2013 CU6 running on top of Windows Server 2012 R2.
A simple solution is to remove the line <SupervisionTags>$null</SupervisionTags> from the XML exported from the source server. This error is caused because the Set-TransportConfig cmdlet does not allow the attribute SupervisionTags to be $null.
After removing the line and saving the file we can rerun the operation and this time the importing process will succeed, as shown in the figure below.
In this Tutorial we went over an importation error using the ImportEdgeConfig.ps1 and we show one possible solution to fix such issue.