Commands › Exchange Online

Remove-DatabaseAvailabilityGroupServer

Exchange Online ExchangeOnlineManagement Remove-*

Remove a Mailbox server from a database availability group (DAG). To remove a Mailbox server from a DAG, the Mailbox server must not host any replicated databases.

Quick start script

# Remove-DatabaseAvailabilityGroupServer — quick start (serv365.ai)
# 1. Connect (app-only shown; interactive: omit the certificate parameters)
Connect-ExchangeOnline -CertificateThumbprint $thumb -AppId $appId -Organization $org

# 2. Capture the current state first — you cannot roll back what you never recorded
$before = Get-DatabaseAvailabilityGroupServer
$before | Format-List

# 3. Make the change (dry run first)
Remove-DatabaseAvailabilityGroupServer -Identity <DatabaseAvailabilityGroupIdParameter> -MailboxServer <ServerIdParameter> -WhatIf
Remove-DatabaseAvailabilityGroupServer -Identity <DatabaseAvailabilityGroupIdParameter> -MailboxServer <ServerIdParameter>

# 4. Verify and diff
$after = Get-DatabaseAvailabilityGroupServer
Compare-Object ($before | Out-String) ($after | Out-String)

Syntax

Remove-DatabaseAvailabilityGroupServer [-Identity] <DatabaseAvailabilityGroupIdParameter> [-MailboxServer] <ServerIdParameter>
 [-ConfigurationOnly]
 [-Confirm]
 [-DomainController <Fqdn>]
 [-SkipDagValidation]
 [-WhatIf]
 [<CommonParameters>]

Parameters (7)

Parameter	Type	Required	What it controls
-Identity	DatabaseAvailabilityGroupIdParameter	yes	The Identity parameter specifies the name of the DAG from which you're removing the server.
-MailboxServer	ServerIdParameter	yes	The MailboxServer parameter specifies the Mailbox server to remove from the DAG. You can use any value that uniquely identifies the server. For example:
-ConfigurationOnly	SwitchParameter		The ConfigurationOnly switch remove the Mailbox server from the DAG object in Active Directory. You don't need to specify a value with this switch.
-Confirm	SwitchParameter		The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on whether the cmdlet requires confirmation before proceeding.
-DomainController	Fqdn		The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name...
-SkipDagValidation	SwitchParameter		The SkipDagValidation switch specifies whether to bypass the validation of the DAG's quorum model and the health check on the DAG's witness when removing members from the DAG. You don't need to specify a value with...
-WhatIf	SwitchParameter		The WhatIf switch shows what the command does without making any changes. You don't need to specify a value with this switch.

Reference facts derived from Microsoft documentation, © Microsoft, licensed CC BY 4.0; restructured with original guidance by serv365.ai.