====== Address books and address lists in exchange ======
<code powershell>
New-GlobalAddressList -Name Example_Global -ConditionalCompany @{Add="Example ltd"} -IncludedRecipients AllRecipients
Update-GlobalAddressList Example_Global

New-OfflineAddressBook -Name Example_Offline -AddressLists Example_Global
Update-OfflineAddressBook Example_Offline

New-AddressList -Name Example_People -RecipientFilter "((Company -eq 'Example ltd') -and (RecipientType -eq 'UserMailbox'))"
New-AddressList -Name Example_Rooms -RecipientFilter "((Company -eq 'Example ltd') -and (((RecipientType -eq 'UserMailbox') -and (ResourceMetaData -like 'ResourceType:*') -and (ResourceSearchProperties -ne $null))))"
Update-AddressList Example*

New-AddressBookPolicy Example -GlobalAddressList Example_Global -RoomList Example_Rooms -AddressLists Example_People -OfflineAddressBook Example_Offline

Set-MailBox -Identity "user" -AddressBookPolicy Example
</code>
Before deleting the policy, check who uses the policy
<code powershell>Get-Mailbox  | select Name,AddressBookPolicy</code>