Microsoft 365 Core MCP Server

import { ErrorCode, McpError } from '@modelcontextprotocol/sdk/types.js'; import { Client } from '@microsoft/microsoft-graph-client'; import { ExchangeSettingsArgs } from './types.js'; export async function handleExchangeSettings( graphClient: Client, args: ExchangeSettingsArgs ): Promise<{ content: { type: string; text: string; }[]; }> { switch (args.settingType) { case 'mailbox': { if (args.action === 'get') { const settings = await graphClient .api(`/users/${args.target}/mailboxSettings`) .get(); return { content: [{ type: 'text', text: JSON.stringify(settings, null, 2) }] }; } else { await graphClient .api(`/users/${args.target}/mailboxSettings`) .patch(args.settings); return { content: [{ type: 'text', text: 'Mailbox settings updated successfully' }] }; } } case 'transport': { if (args.action === 'get') { const rules = await graphClient .api('/admin/transportRules') .get(); return { content: [{ type: 'text', text: JSON.stringify(rules, null, 2) }] }; } else { await graphClient .api('/admin/transportRules') .post(args.settings?.rules); return { content: [{ type: 'text', text: 'Transport rules updated successfully' }] }; } } case 'organization': { if (args.action === 'get') { const settings = await graphClient .api('/admin/organization/settings') .get(); return { content: [{ type: 'text', text: JSON.stringify(settings, null, 2) }] }; } else { await graphClient .api('/admin/organization/settings') .patch(args.settings?.sharingPolicy); return { content: [{ type: 'text', text: 'Organization settings updated successfully' }] }; } } case 'retention': { if (args.action === 'get') { const tags = await graphClient .api('/admin/retentionTags') .get(); return { content: [{ type: 'text', text: JSON.stringify(tags, null, 2) }] }; } else { if (!args.settings?.retentionTags?.length) { throw new McpError(ErrorCode.InvalidParams, 'No retention tags specified'); } for (const tag of args.settings.retentionTags) { await graphClient .api('/admin/retentionTags') .post(tag); } return { content: [{ type: 'text', text: 'Retention tags updated successfully' }] }; } } default: throw new McpError(ErrorCode.InvalidParams, `Invalid setting type: ${args.settingType}`); } }