When trying to "Create a Link Mailbox" via ARS to "User1 Shadow account (Mailbox Disabled)", it fails with the following error:
"The user account 'client.DomainName.com/User Accounts/User_001' specified to be the master account for this linked mailbox is already the master account of another linked mailbox 'DomainName.info/Messaging/Addressbook/User_001'. Specify a different user account."
See scenario details below:
- Forest1 - AD Managed Domain "DomainA" users Forest: User1 Master account - 'client.DomainName.com/User Accounts/User_001'
- Forest2 - AD Managed Domain "DomainB" users Forest: User1 Contact - 'DomainName.info/Messaging/Addressbook/User_001'
- Forest3 - AD Managed Domain "DomainC" Exchange Resource Forest: User1 Shadow account (Mailbox Disabled)