Your organization test.com acquires the lab.com company. You want all mailboxes are hosted in test.com forest. The users in lab.com forest still use the regular logon identities.
You must create the forest trust.
You create a linked mailbox:lab1 in test.com and associate it with user account:lab1@lab.com. Logon to a lab.com domain from a workstation as lab1. Configuring Outlook manually with msir2.test.com as exchange server and lab1 as user name.
Outlook 2003 cannot open the Linked Mailbox???
Set-RpcClientAccess -Server test1 -EncryptionRequired $false
If you keep the Encryption setting on CAS server, the outlook 2003 client must be configured as shown below:
create a public folder database
Enable Public Folder Distribution for the Default Offline Address Book:
Set-OfflineAddressBook "Default Offline Address Book" -PublicFolderDistributionEnabled $True
Set the offline address book for the database
Set-MailboxDatabase "Mailbox Database 1622253828" -OfflineAddressBook "Default Offline Address Book"
When you configure Outlook 2003, you must check "Encrypt data between Microsoft Office Outlook and Microsoft Exchange Server"
