How to use EWS or Powershell to rename all folders that have a forward slash in them

Question

We have many users that have created folders in Outlook that have forward slashes in the name (i.e. / ). They did this in Outlook/Exchange 2003. We upgraded to Outlook 2010 and this is no longer aloud so there are issues with the folders when performing
functions such as trying to share or using IMAP, etc.
I'm looking for a way to specify a particular user's mailbox in a script and have it traverse every folder/subfolder and check if there is a forward slash in the name. If there is a forward slash I would like to rename the folder to something like the bar
character (i.e |) or another character that is valid.
I had most users go through Outlook manually and clean them up. However there are a handful of users that have hundreds if not thousands of subfolders that have the forward slash in them.
I've done extensive research on this (references to my research below) and came close in putting a script together but I just can't figure it out. Anyone have an example for this? Even if I need to specify a folder within the Inbox and have the script only
process subfolders from this location would be acceptable since most of them are subfolders of a particular folder.
Thank you.
http://social.technet.microsoft.com/Forums/exchange/en-US/b24d0558-ed6a-4854-9a86-e9815741b5d0/rename-folder-example-in-ews?forum=exchangesvrdevelopment
http://exchange-powershell.com/database-management/bulk-public-folder-rename-and-cleanup-script/
http://unlockpowershell.wordpress.com/2010/10/14/powershell-rename-a-mailbox-folder-using-exchange-web-services-api/

Answer 1

First two articles are for public folders so it won't help here as you have mailbox folders...
http://unlockpowershell.wordpress.com/2010/10/14/powershell-rename-a-mailbox-folder-using-exchange-web-services-api/ 
This is good starting point, you might need to change the logics around it  to search / and replace with - or someting, this might be the code change needed from that article but would suggest you to test it first.
foreach ($folder in $ffResponse.Folders)
if ($folder.Displayname -like “*/*”)
Write-Output “Found / in the $mailboxName and folder name is $folder.Displayname”
$folder.Displayname.Replace("/","-")
$folder.Update()
Blog |
Get Your Exchange Powershell Tip of the Day from here