It appears that 2.0.0-preview2 has removed `-SingleValueExtendedProperties` parameter from cmdlets in Microsoft.Graph.Mail

[gmatev]

Support for SingleValueExtendedProperties seems to have been dropped from New-MgUserMessages and New-MgUserMailFolderMessages in 2.0.0-preview2 compared to 1.19.0. The parameter (including the ability to specify it in bodyParams appears to no longer be available.

Was this intentional and what is the path forward for folks who rely on setting SingleValueExtendedProperties for advanced use cases.

[peombwa]

Thanks for bringing this to our attention!

I've traced the issue to how the property is declared in the service metadata, our sole source of truth. The service metadata currently says that the property can only be created via New-MgUserMessageSingleValueExtendedProperty, which is wrong.

In v2.x, we are using a stricter logic to surface modifiable properties as parameters to reduce blot. As part of this logic, we are removing contained nav properties as they are not modifiable directly on a resource.

I've opened an in the metadata repro at microsoftgraph/msgraph-metadata#246 to have this resolved. In the meantime, you can use -AdditionalProperties to add the property to the resource being created:

$SingleValueExtendedProp = @{
    Id = "String {66f5a359-4659-4830-9070-00040ec6ac6e} Name Fun"
    Value = "Food"
}

New-MgUserMessage -UserId $UserId -AdditionalProperties @{ SingleValueExtendedProperties = @($SingleValueExtendedProp) } -Debug

[gmatev]

@peombwa Thank you! This helps.

[peombwa]

Closing as fixed by https://github.com/microsoftgraph/msgraph-sdk-powershell/releases/tag/2.0.0-preview6