MicrosoftDocs · chrisda · Mar 31, 2018 · Mar 30, 2018 · Mar 31, 2018 · Mar 31, 2018
diff --git a/exchange/exchange-ps/exchange/mailboxes/Get-Mailbox.md b/exchange/exchange-ps/exchange/mailboxes/Get-Mailbox.md
@@ -137,7 +137,15 @@ Accept wildcard characters: False
 ### -Arbitration
 This parameter is available only in on-premises Exchange.
 
-The Arbitration parameter specifies that the mailbox for which you are executing the command is an arbitration mailbox. Arbitration mailboxes are used for managing approval workflow. For example, an arbitration mailbox is used for handling moderated recipients and distribution group membership approval.
+The Arbitration switch filters the results by arbitration mailboxes. You don't need to specify a value with this switch.
+
+Arbitration mailboxes are system mailbox that are used for storing different types of system data and for managing messaging approval workflow.
+
+Notes:
+
+- If you don't use this switch, the command can't find arbitration mailboxes.
+
+- To return arbitration mailboxes that are used to store audit log settings or data, you need to use the AuditLog or AuxAuditLog switches instead of the Arbitration switch.
 
 ```yaml
 Type: SwitchParameter
@@ -641,13 +649,21 @@ Accept wildcard characters: False
 ```
 
 ### -AuditLog
-This parameter is reserved for internal Microsoft use.
+This parameter is available only in on-premises Exchange.
+
+The AuxAuditLog switch filters the results by arbitration mailboxes that are used to store audit log settings. You don't need to specify a value with this switch.
+
+Notes: 
+
+- If you don't use this switch, the command can't find this type of arbitration mailbox.
+
+- The Arbitration switch doesn't return this type of arbitration mailbox.
 
 ```yaml
 Type: SwitchParameter
 Parameter Sets: (All)
 Aliases:
-Applicable: Exchange Server 2016, Exchange Online
+Applicable: Exchange Server 2016
 
 Required: False
 Position: Named
@@ -657,13 +673,21 @@ Accept wildcard characters: False
 ```
 
 ### -AuxAuditLog
-This parameter is reserved for internal Microsoft use.
+This parameter is available only in on-premises Exchange.
+
+The AuxAuditLog switch filters the results by arbitration mailboxes that are used to store audit log data. You don't need to specify a value with this switch.
+
+Notes: 
+
+- If you don't use this switch, the command can't find this type of arbitration mailbox.
+
+- The Arbitration switch doesn't return this type of arbitration mailbox.
 
 ```yaml
 Type: SwitchParameter
 Parameter Sets: (All)
 Aliases:
-Applicable: Exchange Server 2016, Exchange Online
+Applicable: Exchange Server 2016
 
 Required: False
 Position: Named

diff --git a/exchange/exchange-ps/exchange/mailboxes/Get-RecoverableItems.md b/exchange/exchange-ps/exchange/mailboxes/Get-RecoverableItems.md
@@ -0,0 +1,242 @@
+---
+applicable: Exchange Online
+schema: 2.0.0
+---
+# Get-RecoverableItems
+
+## SYNOPSIS
+This cmdlet is available only in the cloud-based service.
+
+Use the Get-RecoverableItems items cmdlet to view deleted items in the Recoverable Items folder in mailboxes. After you find the deleted items, you use the Restore-RecoverableItems cmdlet to restore them.
+
+For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax (https://technet.microsoft.com/library/bb123552.aspx).
+
+## SYNTAX
+
+```
+Get-RecoverableItems -Identity <GeneralMailboxOrMailUserIdParameter> [-EntryID <String>] [-FilterEndTime <DateTime>] [-FilterItemType <String>] [-FilterStartTime <DateTime>] [-LastParentFolderID <String>] [-ResultSize <Unlimited>] [-SourceFolder <DeletedItems | RecoverableItems>] [-SubjectContains <String>] [<CommonParameters>]
+```
+
+## DESCRIPTION
+You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet (https://technet.microsoft.com/library/mt432940.aspx).
+
+## EXAMPLES
+
+### Example 1
+```
+Get-RecoverableItems -Identity laura@contoso.com -Subject -SubjectContains "FY17 Accounting" -FilterItemType IPM.Note -FilterStartTime "2/1/2018 12:00:00 AM" -FilterEndTime "2/5/2018 11:59:59 PM"
+```
+
+This example returns all of the available recoverable deleted messages with the specified subject in the mailbox laura@contoso.com for the specified date/time range.
+
+## PARAMETERS
+
+### -Identity
+The Identity parameter specifies the mailbox that contains the Recoverable Items folder that you want to view. You can use any value that uniquely identifies the mailbox.
+
+For example:
+
+- Name
+
+- Display name
+
+- Alias
+
+- Distinguished name (DN)
+
+- Canonical DN
+
+- \<domain name>\<account name>
+
+- Email address
+
+- GUID
+
+- LegacyExchangeDN 
+
+- SamAccountName 
+
+- User ID or user principal name (UPN)
+
+```yaml
+Type: GeneralMailboxOrMailUserIdParameter
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: 1
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -EntryID
+The EntryID parameter specifies the deleted item that you want to restore. The EntryID value for the deleted item is unique in the mailbox.
+
+You can find the EntryID for specific items by using other search filters on the Get-ReoverableItems cmdlet (subject, date range, etc.).
+
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -FilterEndTime
+The FilterEndTime specifies the end date/time of the date range.
+
+Use the short date format that's defined in the Regional Options settings on the computer where you're running the command. For example, if the computer is configured to use the short date format mm/dd/yyyy, enter 09/01/2015 to specify September 1, 2015. You can enter the date only, or you can enter the date and time of day. If you enter the date and time of day, enclose the value in quotation marks ("), for example, "09/01/2015 5:00 PM".
+
+```yaml
+Type: DateTime
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -FilterItemType
+The FilterItemType parameter filters the results by the specified MessageClass (ItemClass) property value of the deleted item. For example:
+
+- IPM.Appointment (Meetings and appointments)
+
+- IPM.Contact
+
+- IPM.File
+
+- IPM.Note
+
+- IPM.Task
+
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -FilterStartTime
+The FilterStartTime specifies the start date/time of the date range.
+
+Use the short date format that's defined in the Regional Options settings on the computer where you're running the command. For example, if the computer is configured to use the short date format mm/dd/yyyy, enter 09/01/2015 to specify September 1, 2015. You can enter the date only, or you can enter the date and time of day. If you enter the date and time of day, enclose the value in quotation marks ("), for example, "09/01/2015 5:00 PM".
+
+```yaml
+Type: DateTime
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -LastParentFolderID
+The LastParentFolderID parameter specifies the FolderID value of the item before it was deleted. For example, 53B93149989CA54DBC9702AE619B9CCA000062CE9397.
+
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -ResultSize
+The ResultSize parameter specifies the maximum number of results to return. If you want to return all requests that match the query, use unlimited for the value of this parameter. The default value is 1000.
+
+```yaml
+Type: Unlimited
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -SourceFolder
+The SourceFolder parameter specifies the folder in the mailbox to search for deleted items. Valid values are:
+
+- DeletedItems: The Deleted Items folder.
+
+- RecoverableItems: Recoverable items that have been deleted from the Deleted Items folder.
+
+If you don't use this parameter, the command will search both locations.
+
+```yaml
+Type: DeletedItems | RecoverableItems
+Parameter Sets: (All)
+Aliases:
+Accepted values: DeletedItems, RecoverableItems
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### -SubjectContains
+The SubjectContains parameter filters the items by the specified text value in the Subject field. If the value contains spaces, enclose the value in quotation marks (").
+
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+Applicable: Exchange Online
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
+### CommonParameters
+This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters (https://go.microsoft.com/fwlink/p/?LinkID=113216).
+
+## INPUTS
+
+###  
+To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types (https://go.microsoft.com/fwlink/p/?LinkId=616387). If the Input Type field for a cmdlet is blank, the cmdlet doesn't accept input data.
+
+## OUTPUTS
+
+###  
+To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types (https://go.microsoft.com/fwlink/p/?LinkId=616387). If the Output Type field is blank, the cmdlet doesn't return data.
+
+## NOTES
+
+## RELATED LINKS
+
+[Online Version](https://docs.microsoft.com/powershell/module/exchange/mailboxes/Get-RecoverableItems)
diff --git a/exchange/exchange-ps/exchange/mailboxes/New-Mailbox.md b/exchange/exchange-ps/exchange/mailboxes/New-Mailbox.md
@@ -704,7 +704,11 @@ Accept wildcard characters: False
 ### -Arbitration
 This parameter is available only in on-premises Exchange.
 
-The Arbitration parameter specifies that the mailbox for which you are executing the command is an arbitration mailbox. Arbitration mailboxes are used for managing approval workflow. For example, an arbitration mailbox is used for handling moderated recipients and distribution group membership approval.
+The Arbitration switch specifies that the mailbox you're creating is an arbitration mailbox. You don't need to specify a value with this switch.
+
+Arbitration mailboxes are system mailbox that are used for storing different types of system data and for managing messaging approval workflow.
+
+Note: To create an arbitration mailbox that's used to store audit log settings or data, you need to use the AuditLog or AuxAuditLog switches instead of the Arbitration switch.
 
 ```yaml
 Type: SwitchParameter
@@ -2065,7 +2069,13 @@ Accept wildcard characters: False
 ```
 
 ### -AuditLog
-This parameter is reserved for internal Microsoft use.
+The AuditLog switch specifies the mailbox is an arbitration mailbox that's used to store audit log settings. You don't need to specify a value with this switch.
+
+Notes: 
+
+- This switch is required only if you're creating this type of arbitration mailbox.
+
+- The Arbitration switch doesn't work for creating this type of arbitration mailbox.
 
 ```yaml
 Type: SwitchParameter
@@ -2081,7 +2091,14 @@ Accept wildcard characters: False
 ```
 
 ### -AuxAuditLog
-This parameter is reserved for internal Microsoft use.
+The AuxAuditLog switch specifies the mailbox is an arbitration mailbox that's used to store audit log data. You don't need to specify a value with this switch.
+
+Notes: 
+
+- This switch is required only if you're creating this type of arbitration mailbox.
+
+- The Arbitration switch doesn't work for creating this type of arbitration mailbox.
+
 
 ```yaml
 Type: SwitchParameter