Parameter Attribute DataType Description Allowed Values
Identity Key String The Identity parameter specifies the AvailabilityAddressSpace you want to modify.
AccessMethod Write String The AccessMethod parameter specifies how the free/busy data is accessed. Valid values are:PerUserFB, OrgWideFB, OrgWideFBBasic,InternalProxy PerUserFB, OrgWideFB, OrgWideFBBasic, InternalProxy
Credentials Write String The Credentials parameter specifies the username and password that's used to access the Availability services in the target forest.
ForestName Write String The ForestName parameter specifies the SMTP domain name of the target forest for users whose free/busy data must be retrieved. If your users are distributed among multiple SMTP domains in the target forest, run the Add-AvailabilityAddressSpace command once for each SMTP domain.
TargetAutodiscoverEpr Write String The TargetAutodiscoverEpr parameter specifies the Autodiscover URL of Exchange Web Services for the external organization. Exchange uses Autodiscover to automatically detect the correct server endpoint for external requests.
Ensure Write String Specifies if this AvailabilityAddressSpace should exist. Present, Absent
Credential Write PSCredential Credentials of the Exchange Global Admin
ApplicationId Write String Id of the Azure Active Directory application to authenticate with.
TenantId Write String Id of the Azure Active Directory tenant used for authentication.
CertificateThumbprint Write String Thumbprint of the Azure Active Directory application's authentication certificate to use for authentication.
CertificatePassword Write PSCredential Username can be made up to anything but password will be used for CertificatePassword
CertificatePath Write String Path to certificate used in service principal usually a PFX file.
ManagedIdentity Write Boolean Managed ID being used for authentication.


Create a new AvailabilityAddressSpace in your cloud-based organization.



To authenticate with Microsoft Exchange, this resource required the following permissions:


  • Federated Sharing, Mail Tips, Message Tracking

Role Groups

  • Organization Management


Example 1

This example is used to test new resources and showcase the usage of new resources being worked on. It is not meant to use as a production baseline.

Configuration Example
        [Parameter(Mandatory = $true)]

    Import-DscResource -ModuleName Microsoft365DSC

    node localhost
        EXOAvailabilityAddressSpace 'ConfigureAvailabilityAddressSpace'
            Identity              = 'Contoso.com'
            AccessMethod          = 'OrgWideFB'
            ForestName            = 'example.contoso.com'
            TargetAutodiscoverEpr = 'https://contoso.com/autodiscover/autodiscover.xml'
            Ensure                = 'Present'
            Credential            = $credsGlobalAdmin