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Procedures for offline address books in Exchange Server

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An offline address book (OAB) in Exchange Server allows Outlook users in cached Exchange mode to access address list and global address list information while they're disconnected from the server. For more information, see Offline address books in Exchange Server.

Here's a list of OAB procedures that are covered in this topic:

To change the OAB generation schedule, see Change the offline address book generation schedule in Exchange Server.

What do you need to know before you begin?

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Use the Exchange Management Shell to view offline address books

To view OABs, use the following syntax:

Get-OfflineAddressBook [-Identity <OABIdentity>]

This example returns a summary list of all OABs in your organization.

Get-OfflineAddressBook

This example returns detailed information about the OAB named Default Offline Address Book.

Get-OfflineAddressBook -Identity "Default Offline Address Book" | Format-List

This example returns values for the specified properties on all OABs in your organization.

Get-OfflineAddressBook | Format-List Name,GUID,AddressLists,GeneratingMailbox,IsDefault,VirtualDirectories,GlobalWebDistributionEnabled,ShadowMailboxDistributionEnabled

For detailed syntax and parameter information, see Get-OfflineAddressBook.

Use the Exchange Management Shell to create offline address books

If you've created multiple address lists, you can use OABs to make the address lists available to users when they're offline.

To create new offline address books, use the following syntax:

New-OfflineAddressBook -Name "<Name>" -AddressLists "<GlobalAddressListOrAddressList1>","<GlobalAddressListOrAddressList2>,..." [-GlobalWebDistributionEnabled $true] [-GeneratingMailbox <OrganizationMailboxIdentity>] [-IsDefault $true] [-ShadowMailboxDistributionEnabled $true]

This example creates a new OAB named Contoso Executives OAB with the following properties:

  • The Default Global Address List and Contoso Executives Address List are included in the OAB.

  • All OAB virtual directories in the organization can accept requests to download the OAB.

  • The organization mailbox that's responsible for generating the OAB is SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c} (we didn't use the GeneratingMailbox parameter to specify a different organization mailbox).

  • The OAB isn't used by mailboxes and mailbox databases that don't have an OAB specified (we didn't use the IsDefault parameter with the value $true).

  • Shadow distribution for the OAB is disabled (read-only copies of the OAB aren't copied to all other organization mailboxes, because we didn't use the ShadowMailboxDistributionEnabled parameter with the value $true).

New-OfflineAddressBook -Name "Contoso Executives OAB" -AddressLists "Default Global Address List","Contoso Executives Address List" -GlobalWebDistributionEnabled $true

For detailed syntax and parameter information, see New-OfflineAddressBook.

How do you know this worked?

To verify that you've successfully created the OAB, run the following command to verify the property values:

Get-OfflineAddressBook | Format-List Name,AddressLists,GeneratingMailbox,IsDefault,VirtualDirectories,GlobalWebDistributionEnabled

Use the Exchange Management Shell to modify offline address books

To modify OABs, use the following syntax:

Set-OfflineAddressBook -Identity "<OABIdentity>" [-Name <Name>] [-AddressLists "<GlobalAddressListOrAddressList1>","<GlobalAddressListOrAddressList2>,..."] [-VirtualDirectories $null] [-GlobalWebDistributionEnabled $true] [-GeneratingMailbox <OrganizationMailboxIdentity>] [-IsDefault $true] [-ShadowMailboxDistributionEnabled <$true | $false>]

For detailed syntax and parameter information, see Set-OfflineAddressBook.

Use the Exchange Management Shell to configure the default offline address book

By default, the automatically created OAB named Default Offline Address Book is the default OAB. The default OAB is used by:

  • Mailboxes in mailbox databases where the database has no OAB assigned (by default, all databases)

  • Mailboxes without an address book policy (ABP) assigned, or where the assigned ABP policy has no OAB defined (by default, there are no ABPs).

  • Mailboxes without an OAB assigned (by default, all mailboxes)

This example configures the OAB named Contoso Executives OAB to be the default OAB.

Set-OfflineAddressBook -Identity "Contoso Executives OAB" -IsDefault $true

Use the Exchange Management Shell to add and remove address lists from offline address books

When you modify the address lists that are configured in an OAB, the values that you specify will replace any address lists in the OAB. To add address lists to the OAB, specify the current address lists plus the ones you want to add. To remove address lists from the OAB, specify the current address lists minus the ones you want to remove.

In this example, the OAB named Marketing OAB is already configured with Address List 1 and Address List 2. To keep those address lists and add Address List 3, run the following command:

Set-OfflineAddressBook -Identity "Marketing OAB" -Address Lists "Address List1","Address List 2","Address List 3"

Similarly, to keep the OAB configured with Address List 1 and Address 2, but remove Address List 3, run the following command:

Set-OfflineAddressBook -Identity "Marketing OAB" -AddressLists "Address List 1","Address List 2"

Use the Exchange Management Shell to change the organization mailbox that's responsible for generating an offline address book

Typically, you only need to configure multiple organization mailboxes if you have Exchange servers in different Active Directory sites. You can configure multiple OABs to use the same organization mailbox, but you can't configure an OAB to use more than one organization mailbox. If you need multiple copies of the OAB in different locations, enable shadow distribution for the OAB. For more information, see the Use the Exchange Management Shell to enable shadow distribution for offline address books section in this topic.

This example changes the organization mailbox that's responsible for generating the OAB named Default Offline Address Book.

Set-OfflineAddressBook -Identity "Default Offline Address Book" -GeneratingMailbox OABGen2

Note: To configure an arbitration mailbox that you can use as an organization mailbox, see the Use the Exchange Management Shell to create organization mailboxes section in this topic.

Use the Exchange Management Shell to configure any virtual directory in the organization to accept download requests for the OAB

The Client Access (frontend) services on any Mailbox server can proxy the OAB download request to the correct location. The OAB files are downloaded from the backend location %ExchangeInstallPath%ClientAccess\OAB\<OAB GUID> on the Mailbox server that holds the active copy of the OAB's designated organization mailbox (or from the server that holds a shadow copy of the OAB).

This example modifies the OAB named Default Offline Address Book to allow any virtual directory in the organization to accept requests to download the OAB.

  1. Run the following command:

    Set-OfflineAddressBook -Identity "Default Offline Address Book" -VirtualDirectories $null

  2. Run the following command:

    Set-OfflineAddressBook -Identity "Default Offline Address Book" -GlobalWebDistributionEnabled $true

Use the Exchange Management Shell to enable shadow distribution for offline address books

Before you enable shadow distribution to distribute a read-only copy of the OAB to organization mailboxes in different Active Directory sites, verify that an organization mailbox exists in each site. To create organization mailboxes, see the Use the Exchange Management Shell to create organization mailboxes section in this topic.

This example enables shadow distribution for the OAB named Contoso Executives OAB.

Set-OfflineAddressBook -Identity "Contoso Executives OAB" -ShadowMailboxDistributionEnabled $true

How do you know this worked?

To verify that you've successfully modified the OAB, run the following command to verify the property values:

Get-OfflineAddressBook | Format-List Name,AddressLists,GeneratingMailbox,IsDefault,VirtualDirectories,GlobalWebDistributionEnabled,

Use the Exchange Management Shell to update offline address books

Changes in an OAB aren't available to users until the scheduled OAB generation (by default, every 8 hours). If you don't want to wait, you can use the procedures in this topic to immediately update an OAB.

To change the OAB generation schedule, see Change the offline address book generation schedule in Exchange Server.

To update an OAB, use the following syntax:

Update-OfflineAddressBook -Identity <OABIdentity>

This example updates the OAB named Default Offline Address Book.

Update-OfflineAddressBook -Identity "Default Offline Address Book"

This example updates all OABs.

Get-OfflineAddressBook | Update-OfflineAddressBook

For detailed syntax and parameter information, see Update-OfflineAddressBook.

Use the Exchange Management Shell to remove offline address books

To remove OABs, use the following syntax:

Remove-OfflineAddressBook -Identity <OABIdentity>

This example removes the OAB named Contoso Executives OAB.

Remove-OfflineAddressBook -Identity "Contoso Executives OAB"

Note: If the removed OAB is the default OAB, you need to create or configure another OAB as the default (the IsDefault parameter value is $true).

How do you know this worked?

To verify that you've successfully removed the OAB, run the following command to verify that the OAB is gone.

Get-OfflineAddressBook

Use the Exchange Management Shell to find organization mailboxes

Only organization mailboxes can generate OABs. An organization mailbox is an arbitration mailbox that has the OrganizationCapabilityOABGen value in the PersistedCapability property. To find the organization mailboxes in your organization, run the following command:

Get-Mailbox -Arbitration | where {$_.PersistedCapabilities -like "*OAB*"} | Format-List Name,ServerName,PersistedCapabilities

To find the organization mailbox that's used to generate an OAB, run the following command:

Get-OfflineAddressBook | Format-List Name,AddressLists,GeneratingMailbox,IsDefault

Use the Exchange Management Shell to create organization mailboxes

Typically, you only need to create multiple arbitration mailboxes in multi-site Exchange organizations. You can have an organization mailbox in each site, and you can configure shadow distribution for an OAB (so a read only copy of the OAB is stored in all organization mailboxes). For more information, see Use the Exchange Management Shell to enable shadow distribution for offline address books.

You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Recipient Provisioning Permissions" section in the Recipients Permissions topic.

  1. Create an arbitration mailbox by using the following syntax:

    New-Mailbox -Arbitration -Name <UniqueName> -UserPrincipalName <UPN> [-Database <DBIdentity>] [-Alias <Alias>] [-DisplayName "<DisplayName>"]

    This example creates a new arbitration mailbox named OAB Gen 2, with the UPN (account name) oabgen2@contoso.com, in the default database.

    New-Mailbox -Arbitration -Name "OAB Gen 2" -UserPrincipalName oabgen2@contoso.com

  2. Turn the arbitration mailbox into an organization mailbox by using the following syntax:

    Set-Mailbox -Identity <MailboxIdentity> -Arbitration -OABGen $true -MaxSendSize 1GB

    This example turns the OAB Gen 2 arbitration mailbox into an organization mailbox.

    Set-Mailbox -Identity "OAB Gen 2" -Arbitration -OABGen $true -MaxSendSize 1GB

  3. To activate the OAB generation capabilities of the new organization mailbox, run Update-OfflineAddressBook for any OAB in the organization. For example:

    Update-OfflineAddressBook -Identity "Default Offline Address Book"

How do you know this worked?

To verify that you've successfully created an organization mailbox, run the following command and verify the mailbox is returned:

Get-Mailbox -Arbitration | where {$_.PersistedCapabilities -like "*OAB*"} | Format-List Name,ServerName,PersistedCapabilities

Assign offline address books to mailbox databases

When you assign an OAB to a mailbox database, all mailboxes in the databases will use that OAB instead of the default OAB, unless the mailbox has an OAB assigned. By default, no OAB is assigned to a mailbox database.

You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Mailbox databases" entry in the Recipients Permissions topic.

Use the EAC to assign an offline address book to a mailbox database

  1. Open the EAC, and go to Servers > Databases. Select the database from the list, and then click Edit (Edit icon.).

    In the EAC, go to Servers > Databases, select the database, and click Edit.

  2. The Mailbox Database window opens. Click the Client settings tab, and then click Browse next to Offline address book.

    In the properties of the database, select Client Settings, and then click Browse.

  3. In the Select Offline Address Book window that opens, select the OAB from the list, and click OK.

  4. Back in the Mailbox Database window, click Save.

Use the Exchange Management Shell to assign an offline address book to a mailbox database

Use the following syntax:

Set-MailboxDatabase -Identity <DatabaseIdentity> -OfflineAddressBook <OABIdentity>

This example assigns the OAB named Contoso Executives OAB to the mailbox database named MBX DB02.

Set-MailboxDatabase -Identity "MBX DB02" -OfflineAddressBook "Contoso Executives OAB"

How do you know this worked?

To verify that you've successfully assigned an OAB to a mailbox database, use either of the following procedures:

  • In the EAC, go to Servers > Databases. Select the database from the list, and then click Edit (Edit icon.). In the Mailbox database window opens, click the Client settings tab, and verify that the OAB is listed in Offline address book.

  • In the Exchange Management Shell, run the following command:

    Get-MailboxDatabase | Format-Table -Auto Name,OfflineAddressBook

Use the Exchange Management Shell to assign offline address books to mailboxes

When you assign an OAB to a mailbox, the default OAB and the OAB that's assigned to the mailbox database (if any) aren't used by the mailbox. By default, no OAB is assigned to a mailbox.

Note: If the mailbox has an address book policy (ABP) assigned, and the ABP has an OAB defined, the OAB that's directly assigned to the mailbox will take precedence over the ABP. For more information ABPs, see Address book policies in Exchange Server.

You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Recipient Provisioning Permissions" section in the Recipients Permissions topic.

To assign an OAB to a mailbox, use the following syntax:

Set-Mailbox -Identity <MailboxIdentity> -OfflineAddressBook <OABIdentity>

This example assigns the OAB named Contoso Executives to the mailbox laura@contoso.com.

Set-Mailbox -Identity laura@contoso.com -OfflineAddressBook "Contoso Executives OAB"

This example assigns the OAB named Contoso US to a filtered list of mailboxes.

$USContoso = Get-User -ResultSize Unlimited -Filter "RecipientType -eq 'UserMailbox' -and Company -eq 'Contoso' -and CountryOrRegion -eq 'US'"; $USContoso | foreach {Set-Mailbox $_.Identity -OfflineAddressBook "Contoso United States"}

How do you know this worked?

To verify that you've successfully assigned an OAB to a mailbox, replace <MailboxIdentity> with the identity of the mailbox, and run the following command:

Get-Mailbox -Identity "<MailboxIdentity>" | Format-Table -Auto Name,OfflineAddressBook