Mailbox Assignments

Exports all non-default mailbox permissions (delegates, shared access, etc.) to CSV. Filters out the default NT AUTHORITY\SELF entries.

Script


Get-EXOMailbox -ResultSize Unlimited |
    Get-ExoMailboxPermission |
    Where-Object { $_.User -notlike "NT AUTHORITY\SELF" } |
    Select-Object Identity, User, PrimarySmtpAddress, Deny, AccessRights, IsInherited |
    Export-Csv -Path "~/mailboxpermissions.csv" -NoTypeInformation

Output

Exports a CSV with:

Identity — Mailbox identity
User — The delegate/user with access
PrimarySmtpAddress
Deny — Whether this is a deny permission
AccessRights — e.g. FullAccess, ReadPermission
IsInherited