Can Custom Attribute 7 be added to any of the reports?
Custom Attribute 7 Field can be added to some of the Mailbox Reports.
For example, The Inventory Report - Mailboxes or the following datasources:
Mailboxes - Base Attributes
Mailboxes - Mailbox Delegates
Mailboxes - Mailbox Security
Mailboxes - Mailbox Sizes Most Recent
Mailboxes - Top N Mailbox Sizes Trend Graph
Inventory Reports - Mailbox Owner Validation
Inventory Reports - Mailboxes, Inventory Reports - Mailboxes Exceeded Quotas
Inventory Reports - Mailboxes whose Primary Account is a Group
Inventory Reports - Mailboxes with Disabled Accounts
Inventory Reports - Orphaned Mailboxes
Inventory Reports - Primary Accounts with more than one Mailbox