Once again PowerShell came to the rescue. Very quickly I was able to find the folder using its email address from the GAL and give him the public folder path he needed to make the necessary changes. Here is how you can do it:
First I set the PowerShell scope to view our entire forest (we have many domains and multiple Exchange administrative groups). This is done by changing the properties of the $AdminSessionADSettings variable. Evan Dodds has a good blog post about $AdminSessionADSettings.
$AdminSessionADSettings.ViewEntireForest = $True
Next I used the Get-MailPublicFolder cmdlet to identify the public folder in question:
I was able to identify the public folder but I still didn’t know the public folder path so that my colleague could make the necessary changes. I found this by piping the results from my previous command to the Get-PublicFolder cmdlet.
Get-MailPublicFolder email@example.com | Get-PublicFolder
Now I could use the ‘ParentPath’ attribute to find the public folder path so that he could make the necessary changes.
[PS] C:\>$AdminSessionADSettings.ViewEntireForest = $True
[PS] C:\>$HelpDeskPF = (Get-MailPublicFolder firstname.lastname@example.org | Get-PublicFolder)
The help desk folder was located within the 'Resumes' folder??? No wonder he couldn't find it.