The issue is regarding the behavior of Identity Manager (1IM) when trying to change an attribute of Linked Mailbox.
SCENARIO: Two domains, one with logon accounts (named A) and one with resources (named B) where Linked Mailboxes reside.
By default, the accounts in domain B are created disabled.
In this case, accounts in domain B are enabled because they are synchronized with Azure AD.
- When trying to change an attribute of Linked Mailbox with account in domain B enabled.
- 1IM generates an error, because by default wants account in domain B disabled.
Is there a workaround to bypass the check of user account status (enabled/disabled)?
Because the user account that is created in the Exchange forest is disabled when creating a linked mailbox, the user doesn't use the user logon name to sign into the linked mailbox. This is the way Microsoft handle linked mailboxes.
For more information regarding linked mailboxes, please refer to the following document:
Manage linked mailboxes