We're troubleshooting some users who are not getting auto-mapped mailboxes in their Outlook as expected. We've just rolled out new systems running Office 2010 Many users don't get a mailbox auto-mapped as expected. We checked the mailbox to be shared and found the users AD object in the msExchDelegateListLink attribute. We checked the users msExchDelegateListBL attribute and found the shared mailbox there. (we could only see the msExchangeDelegateListBL using Powershell, not the EMC - why is that?) Currently, the only way we've gotten Auto-Mapping to work is to remove the user from the shared mailbox and then add them back in with Full Access. The mailbox shows up instantly then. Everything appears to be correct on the AD side. What else might be causing this? Maybe because users are using brand new systems? New mail profiles?Orange County District Attorney

New profiles could do it, I would think. The BL property is a back-link. It's managed by Active Directory--you never populate a BL propery yourself. In fact, AD won't let you. The next time you upgrade systems, consider using a tool like USMT to preserve the user profile.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Thanks for the insight Ed. User Profile creation seems to be the one consistent factor in this issue.Orange County District Attorney

If you're running in small scale, the tool that comes with Windows 7, Easy Transfer Wizard, has worked well for me.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi, Any updates on this issue? Thanks, Evan Liu TechNet Subscriber Supportin forum If you have any feedback on our support, please contacttngfb@microsoft.comEvan Liu TechNet Community Support

We're planning on incorporating your script suggestion to fix this issue with users. It's not the most elegant but it does work.Orange County District Attorney

Yes, that's just one workaround. How about the issue now, any updates? Thanks, Evan Liu TechNet Subscriber Supportin forum If you have any feedback on our support, please contacttngfb@microsoft.comEvan Liu TechNet Community Support

Thanks for your reply. Glad you have found a better way to work on this issue. Best Regards, Evan Liu TechNet Subscriber Supportin forum If you have any feedback on our support, please contacttngfb@microsoft.comEvan Liu TechNet Community Support