We’ve been working on some major upgrades to our Exchange environment over the last while. During the course of that, we started receiving NDR’s for messages sent to mail-enabled public folders. Initially, these were “MapiExceptionNotAuthorized” messages, which are related to permissions. Those were sorted out without too much trouble, as the NDR is at least somewhat descriptive. But then we started receiving a very generic NDR of #550 4.4.7 QUEUE.Expired; message expired ##. …not really much to go on. Exchange 2007 does give some more “in plain English, please!” information in its NDR’s, but that also wasn’t much help: Delivery has failed to these recipients or distribution lists: [user display name] Microsoft Exchange has been trying to deliver this message without success and has stopped trying. Please try sending this message again, or provide the following diagnostic text to your system administrator. Wow…that was helpful… ... Read more

Lately, our company has started developing user web portals for our clients. The main goal is to provide a central reference point for common links (webmail, helpdesk, remote assistance links … ), howto documents, and other files and resources. A secondary goal was to also allow user administrators to perform basic user management through a web interface. This would include things like disabling/creating/unlocking user accounts, resetting passwords, and modifying group memberships for access reasons. ... Read more

Part I demonstrated how to find aged or inactive accounts, and in Part II we will look at another lingering account type: disabled accounts. Like inactive accounts, Directory Searchers also come in handy for disabled accounts. We can also, however, read an Active Directory account’s status directly from a hidden attribute on the ADSI object. Let’s start with the Directory Searcher method. This entry also draws from Bahram’s Blog. The code: ... Read more

We’ll start off with Inactive accounts first, and then work on the disabled accounts after that. Active Directory in Server 2003 has a nice user/computer attribute called lastLogonTimeStamp that can help us keep track of inactive accounts. If you have ever tried to use that attribute, however, you might have come up with something like this… PoSH> $struserdn = "CN=Some User,OU=Users,OU=Corp,DC=yourdomain,DC=local" PoSH> $adobjuser = [ADSI]"LDAP://$struserdn" PoSH> $adobjuser {CN=Some User,OU=Users,OU=Corp,DC=yourdomain,DC=local} PoSH> $adobjuser. ... Read more

On a recent Exchange 2003 to 2007 upgrade, I ran into a very frustrating issue that significantly delayed our deployment. All new mailboxes that were created on using Exchange 2007 tools (Exchange 2007 Management Console or Powershell) were missing several crucial ADSI attributes, namely: legacyExchangeDN msExchALObjectVersion msExchMailboxGuid msExchMailboxSecurityDescriptor (set to “not set”, all other accounts have a blank value here) msExchUserAccountControl Of these, the most important seem to be msExchMailboxGuid and msExchMailboxSecurityDescriptor. ... Read more

I had hoped to put this all in one post, but the thing would have gone on forever! Part I covered some basics in copying group memberships to an Active Directory user from another user, such as a template account, using Powershell. Part II will delve into my misadventures in gaining more control of user group memberships, including removing users from a group either by editing the group’s attributes or editing the user’s attributes. ... Read more

I recently had to spend hours figuring out how to properly modify Active Directory group memberships using Powershell. Some of the .Net methods have not yet been implemented, so I had to get a bit tricky with it. I could find the various bits of information I needed in various places, so I hope that collecting them here in one place is of some use to others. The scenario was that I needed to disable user accounts in a Windows Server 2003 Active Directory environment running with Exchange 2007. ... Read more