# Darrel Miller (slim) > Darrel Miller is partner API Architect. Microsoft Excel (Microsoft Graph workbook API), Microsoft Graph Calendar API, Microsoft Graph People and Contacts API, Microsoft Teams (Microsoft Graph), OneDrive and SharePoint files (Microsoft Graph) and Outlook Mail (Microsoft Graph) on Anchor Terminal, with grades, an about and public profiles. - Full: https://www.anchorterminal.com/people/darrel-miller/index.md (~1,800 tokens) · this version ~1,580 tokens · JSON https://www.anchorterminal.com/people/darrel-miller/index.json · canonical https://www.anchorterminal.com/people/darrel-miller/ - Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-27 - Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data) Partner API Architect. - LinkedIn: https://www.linkedin.com/in/darrelmiller/ ## What Darrel builds - [Microsoft Excel (Microsoft Graph workbook API)](https://www.anchorterminal.com/tools/microsoft-excel-graph.md), graded C, 58.6/100, in Spreadsheets & operational tables. Workbook endpoints of Microsoft Graph for Excel files stored in OneDrive for work or school and SharePoint. Calls read and write ranges, tables, charts and named items, and run Excel worksheet functions on a file in place. Partner API Architect, researched 2026-10-26. - [Microsoft Graph Calendar API](https://www.anchorterminal.com/tools/microsoft-graph-calendar.md), graded B, 65.2/100, in Calendars & scheduling. Calendar endpoints of Microsoft Graph for Outlook, Microsoft 365 and Exchange Online. Partner API Architect, researched 2026-10-26. - [Microsoft Graph People and Contacts API](https://www.anchorterminal.com/tools/microsoft-graph-people.md), graded B, 64.7/100, in Contacts & address books. Microsoft Graph endpoints for a user's Outlook personal contacts and contact folders, with delta sync, and the people API, which ranks the people most relevant to a user and supports fuzzy search. Partner API Architect, researched 2026-10-26. - [Microsoft Teams (Microsoft Graph)](https://www.anchorterminal.com/tools/microsoft-teams.md), graded B, 62.3/100, in Work & productivity. Microsoft Graph endpoints for Microsoft Teams. An app lists teams, channels and chats, reads and sends messages, manages members and receives change notifications over REST, with OAuth tokens from Microsoft Entra ID for work or school accounts. Partner API Architect, researched 2026-10-26. - [OneDrive and SharePoint files (Microsoft Graph)](https://www.anchorterminal.com/tools/onedrive-sharepoint.md), graded B, 65.4/100, in File storage & sharing. Drive and driveItem endpoints of Microsoft Graph for files in OneDrive, OneDrive for work or school and SharePoint document libraries. Calls upload, download, list, search, share by link or invitation, and delete files and folders. Partner API Architect, researched 2026-10-26. - [Outlook Mail (Microsoft Graph)](https://www.anchorterminal.com/tools/outlook-mail-graph.md), graded B, 66.4/100, in Mailbox access. Mail endpoints of Microsoft Graph for Outlook, Microsoft 365 and Exchange Online mailboxes. An app reads, searches, drafts, sends and files messages over REST with OAuth tokens from Microsoft Entra ID. Partner API Architect, researched 2026-10-26. ## Works with - [Achint Srivastava](https://www.anchorterminal.com/people/achint-srivastava/), VP of Software Engineering, Office of the CTO; Decision-1 launch author - [Bill Gates](https://www.anchorterminal.com/people/bill-gates/), Co-founder, Microsoft - [Brandon Werner](https://www.anchorterminal.com/people/brandon-werner/), Principal Product Architect; Agent ID creator - [Dan Hellem](https://www.anchorterminal.com/people/dan-hellem/), Principal Product Manager, Azure DevOps - [Dong Li](https://www.anchorterminal.com/people/dong-li/), Partner Director; Head of Product, Azure Speech and Voice Agents - [Eric Imasogie](https://www.anchorterminal.com/people/eric-imasogie/), Senior Product Manager; Microsoft Learn MCP server owner - [Faraz Siddiqui](https://www.anchorterminal.com/people/faraz-siddiqui/), Senior Technical Program Manager; Product Manager for Azure Maps Geospatial APIs - [Gary Pretty](https://www.anchorterminal.com/people/gary-pretty/), Principal Product Manager, Microsoft Copilot Studio - [Julie Strauss](https://www.anchorterminal.com/people/julie-strauss/), Vice President, AI Sales, Marketing and Incubations - [Paul Allen](https://www.anchorterminal.com/people/paul-allen/), Co-founder, Microsoft - [Pieter de Bruin](https://www.anchorterminal.com/people/pieter-de-bruin/), Technical Program Manager; Learn partnerships and MCP integrations - [Sandeep K Sen](https://www.anchorterminal.com/people/sandeep-k-sen/), Product Manager, Azure MCP and CoreAI - [Shawn Henry](https://www.anchorterminal.com/people/shawn-henry/), Principal Group Product Manager; Product Lead, Microsoft Agent Framework - [Tianqi Zhang](https://www.anchorterminal.com/people/tianqi-zhang/), Principal Software Engineering Manager; Learn knowledge-discovery and MCP team - [Vamshidhar Kommineni](https://www.anchorterminal.com/people/vamshidhar-kommineni/), Group Product Manager, Azure Storage - [Yury Semikhatsky](https://www.anchorterminal.com/people/yury-semikhatsky/), Principal Software Engineer; active Playwright MCP maintainer ## Questions ### Who is Darrel Miller? Darrel Miller is partner API Architect. ### What does Microsoft make? Anchor Terminal lists Microsoft Excel (Microsoft Graph workbook API), Microsoft Graph Calendar API, Microsoft Graph People and Contacts API, Microsoft Teams (Microsoft Graph), OneDrive and SharePoint files (Microsoft Graph) and Outlook Mail (Microsoft Graph) from Microsoft. ### How are Darrel's tools graded? Microsoft Excel (Microsoft Graph workbook API) is graded C, 58.6 out of 100; Microsoft Graph Calendar API is graded B, 65.2 out of 100; Microsoft Graph People and Contacts API is graded B, 64.7 out of 100; Microsoft Teams (Microsoft Graph) is graded B, 62.3 out of 100; OneDrive and SharePoint files (Microsoft Graph) is graded B, 65.4 out of 100; Outlook Mail (Microsoft Graph) is graded B, 66.4 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist. ## Sources - https://www.linkedin.com/in/darrelmiller/ - https://www.gatesfoundation.org/about/leadership/bill-gates - https://www.gatesfoundation.org/about/verified-accounts - https://www.linkedin.com/company/microsoft/ - https://x.com/Microsoft/with_replies - https://support.microsoft.com/en-us These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched.