There is a problem with the specified tenant GUID if you see the OrganizationFromTenantGuidNotFound error in the Microsoft Graph API when trying to send messages. This issue typically occurs when a tenant ID is missing or invalid, which frequently happens as a result of Azure Active Directory configuration errors. Successful authentication and message sending over Microsoft Graph are ensured by setting up the appropriate tenancy and permissions.

Getting around the intricacies of using the Microsoft Graph API V6 for sending messages necessitates a thorough configuration of authentication, dependencies, and message composition in a Kotlin context. Developers may effectively automate email functionalities, including handling login failures and adjusting to API version changes, by utilizing the Java SDK.

Using the Microsoft Graph API to access and manage messages in Microsoft 365 offers developers a strong tool.

This session explains how to securely and effectively integrate email services into apps by examining the possibilities of Microsoft Graph for email sending through the passcode authentication flow.