We've created a linked mailbox, in Exchange 2013 (in domain1), for a user in another AD forest, domain2. We have the AutoDiscover service configured in the other AD forest as well. Our only issue now is trying to find a way to get the Outlook Auto Account Setup to automagically configure a user's profile the first time Outlook 2013 is started. If we type in the user's email address and name and click Next, the profile is created successfully.

I spoke to Microsoft support who helped me confirm that AutoDiscovery was configured correctly in the other forest. Reading this information ( https://technet.microsoft.com/en-us/library/bb124251.aspx ) on AutoDiscover, I found what may be the issue. It notes that

"If the Outlook client is joined to a domain, the user's domain account is used."

Since the linked mailbox is associated with domain1, Outlook looks like it cannot use the domain account from domain2. I wonder if there might be a registry hack to bypass this and force Outlook clients in domain2 to look at email addresses in do

Hi,

According to your description, I noticed that If we type in the user's email address and name and click Next, the profile is created successfully. Do you mean the linked mailbox can be setup automatically when you fill in the Name and E-mail Address in the Auto Account Setup page? For example:

If that is the case, the autodiscover service in Exchange side should be configured correctly and it is working for Outlook client automatically account setup.

If the account cant be setup automatically when using autodiscover service, please verify that the Master Account (Domain2\User1) has full access to the Linked Mailbox (User1@domain1.com) as well as the smtp address using the cmdlets Get-Mailbox and Get-MailboxPermission in Exchange server:

Get-Mailbox User1@domain1.com | fl PrimarySmtpAddress,*Type*,*Link*

Get-MailboxPermission User1@domain1.com | fl

Regards,

Thanks for the note back on my question Winnie. I checked the permissions using the PS commands and it looks like the permissions are correct. At this point, I think I'll open a support case with Microsoft and see if they can help me find a way t

Hello,

No updates yet. Microsoft took some Outlook logs a few days ago and are working on them. Hopefully we'll hear something soon! I'll post it as soon as I hear it.