Wednesday, February 24, 2016

Mining the clientinfo property in Messages in Exchange 2013 and Office365 with EWS

Tracking the bewildering array of clients and different Internet browsers that are being used to send email on Exchange can be an interesting challenge especially when your clients are in the cloud. One Mapi property that gets set on the SentItem in the senders Mailbox can help answer some of these questions where logs may not be available. The Named Mapi property clientinfo eg


So if you write a script that accesses this property on messages in the SentItems folder you can build a report of the different sending methods that are being used and also different properties such as the browser version from the agent string being stored eg something like this


I've put a script on GitHub here https://github.com/gscales/Powershell-Scripts/blob/master/GetMailUserAgentsv2.ps1 that can mine the data in the property correctly taking into account the ; used as a separator while also dealing with data enclosed in ( ) (it does this by just doing a character by character parse rather the splitting or using Regex). The script will separate the Primary ClientType and extra client information (eg browser agent string) from the clientinfo property.

The script has a few different options by default it will evaluate every message in the SentItems folder if you use the -days switch you can specify how many days to look back eg

Get-MailUserAgents -Mailbox user@domain -days 14

Will look at messages for the last 14 days, if you want to evaluate messages in the Inbox you can use the -Inbox switch which will change the target folder to the Inbox.

Thursday, February 11, 2016

Enumerating Public Folders using EWS and reporting on Rules and Folder Stats

When people mention Public Folders in Exchange a quote from Mark Twain often comes to mind "the reports of my death are greatly exaggerated", one often thinks the same when people write such things about email.  While Groups in Office 365 offer a compelling alternative, Public Folders are still things Admins need to deal with and Migrate occasionally.

While the Exchange Management Shell cmdlets for reporting on Public Folders have improved a lot in Exchange 2013 you may still have the need from time to time to want to do some more in-depth analysis of what's happening in your Public Folders which is where EWS can come in very useful. The one big difference to reporting on folders in a Public Folder Tree vs doing the same thing in a Mailbox is that in a Public Folder tree you can't do a Deep Traversal. This means to report on Public Folders you need to enumerate the child folders of each parent folder with a separate EWS call. For very large Public Folder trees this can take a considerable amount of time.

The following Script does this enumeration for all the Public Folders (that the Mailbox that is running the script) has access to, it checks to see if there are any Rules that are Active or Disabled, and also produces a basic stats report of the Number of Items, FolderSize and also the PidTagLocalCommitTimeMax time which should give you the last time the items in the folder where last changed. eg it produces something like


With this base you can add-in whatever you want to do with each folder depending on your particular requirements.

I've put a copy of this script on GitHub here https://github.com/gscales/Powershell-Scripts/blob/master/PublicFolderMod.ps1

To Run the script you need to pass in a Mailbox this is used to connect to CAS server and then connect eg

Enum-PublicFolders -MailboxName mailbox@domain.com