In the absence of a dedicated email administrator, connecting a Microsoft 365 account to an application often results in an "admin approval required" message, which is part of Microsoft's security model to protect sensitive data by requiring IT admin intervention for app permissions. This safeguard, managed through Azure Active Directory, ensures that either an admin must approve third-party apps or users can self-approve based on the tenant's configuration. For developers, understanding this process is crucial as it is not indicative of a problem with their integration but rather a feature of Microsoft's security framework. To resolve this issue, a tenant admin must log in and approve the app, enabling all users within that tenant to connect without further prompts. This requirement, while potentially a roadblock, also serves as a trust signal that aligns with enterprise-grade compliance and security standards, helping to build credibility with IT departments and enterprise customers. The series offers practical guidance for non-admins and covers topics like fixing email deliverability issues and understanding Office 365 spam headers.