Hi - I just ran through the installation and have basically a new forest with 1 DC, and a separate member server for Ex2k7. Domain name is tater.com and org name (new) is Mater. Installation seemed to work fine, and I can create a new user plus mailbox in EMC and it works. However, if I try to add a mailbox to an account that was created in ADUC (plain account - no email address or anything like that added), I get an error message that pops up with "Path cannot be null. Parameter name: path". When I click ok, I get the following: Summary: 1 items. 0 succeeded, 1 failed. Elapsed time: 00:00:15 shrekFailed Error:Path cannot be null.Parameter name: path Warning:An unexpected error has occurred and a Watson dump is being generated: Object reference not set to an instance of an object. Management Shell command attempted:Enable-Mailbox -Identity:'tater.com/Users/Ogre, Shrek D.' -Alias:'shrek' -Database:'CN=Mailbox Database,CN=First Storage Group,CN=InformationStore,CN=EX1,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Mater,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=tater,DC=com' Elapsed Time: 00:00:15 Any ideas what I'm doing wrong? Thanks! - Brian

Brian, If you launch ADUC on your Exchange server and right-click on the user account, do you have an Exchange Tasks option? If so, see if there is an option to "Remove Exchange Attributes". I know I've seen some strange oddities in the past with Exchange 2007 and existing user accounts.

Brian - I've repro'd this same behavior and it appears to be related to having a comma in the identity that's being passed. Can you confirm the same problem doesn't occur if the comma is not in the display name you use when you create the user (or if you rename the object in ADUC so that the "name" column doesn't contain a comma)? I've opened a bug, as this should definitely work when there's a comma in the CN. Evan Dodds

Hi Evan - yes, removing the comma did solve the problem, thanks! I used ADSIedit to set the display specifier to "lastname comma space firstname space initial period" so new accounts would use that format as we do in our production environment. For the time being I'll remove all the comma's. Thanks again!

Hi Ben - I don't have any Exchange options in ADUC on the Ex2k7 server when I click on the problem user(s)- I thought all Exchange functionality was removed from ADUC?

Maybe I'm not supposed to say this, but if you re-run adminpak.msi, you'll get them back. :-D

Actually, yes the problem is in the comma, but DisplayName is irrelevant here, - guilty is the FullName. Just a small correction.