Commands › Exchange Online
Add-DatabaseAvailabilityGroupServer
Add a Mailbox server to a database availability group (DAG). A DAG is a set of Mailbox servers that use continuous replication and managed availability to provide automatic database-level recovery from database, server, or network failures.
Quick start script
# Add-DatabaseAvailabilityGroupServer — quick start (serv365.ai)
# 1. Connect (app-only shown; interactive: omit the certificate parameters)
Connect-ExchangeOnline -CertificateThumbprint $thumb -AppId $appId -Organization $org
# 2. Run and inspect
Add-DatabaseAvailabilityGroupServer -Identity <DatabaseAvailabilityGroupIdParameter> -MailboxServer <ServerIdParameter> | Format-List
# 3. Export for evidence / drift tracking
Add-DatabaseAvailabilityGroupServer | Export-Clixml .\DatabaseAvailabilityGroupServer-$(Get-Date -Format yyyyMMdd).xmlSyntax
Add-DatabaseAvailabilityGroupServer [-Identity] <DatabaseAvailabilityGroupIdParameter> [-MailboxServer] <ServerIdParameter>
[-Confirm]
[-DomainController <Fqdn>]
[-SkipDagValidation]
[-WhatIf]
[<CommonParameters>]Parameters (6)
| Parameter | Type | Required | What it controls |
|---|---|---|---|
| -Identity | DatabaseAvailabilityGroupIdParameter | yes | The Identity parameter specifies the name of the DAG to which the server is being added. |
| -MailboxServer | ServerIdParameter | yes | The MailboxServer parameter specifies the Mailbox server to add to the DAG. You can use any value that uniquely identifies the server. For example: |
| -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 adding members to the DAG. You don't need to specify a value with this switch. | |
| -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.