eDiscovery.Read.All

const options = {
	authProvider,
};

const client = Client.init(options);

const ediscoveryCaseMember = {
    recipientType: 'user',
    smtpAddress: '[email protected]'
};

await client.api('/security/cases/ediscoveryCases/b0073e4e-4184-41c6-9eb7-8c8cc3e2288b/caseMembers')
	.post(ediscoveryCaseMember);

Import-Module Microsoft.Graph.Security

$params = @{
	recipientType = "user"
	smtpAddress = "[email protected]"
}

New-MgSecurityCaseEdiscoveryCaseMember -EdiscoveryCaseId $ediscoveryCaseId -BodyParameter $params

# Code snippets are only available for the latest version. Current version is 1.x
from msgraph import GraphServiceClient
from msgraph.generated.models.security.ediscovery_case_member import EdiscoveryCaseMember
from msgraph.generated.models.recipient_type import RecipientType
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = EdiscoveryCaseMember(
	recipient_type = RecipientType.User,
	smtp_address = "[email protected]",
)

result = await graph_client.security.cases.ediscovery_cases.by_ediscovery_case_id('ediscoveryCase-id').case_members.post(request_body)