Microsoft 365 for Home Assistant (Marketplace integration)

Installs: 883 sharing analytics
GitHub stars: 96
Connection: Uses the vendor's cloud
Upkeep: Updated in the last 6 months
Version: v1.12.0, October 26, 2026
Category: Productivity and information, Calendars and to-dos
Kind: Marketplace integration
Brand: Microsoft
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: ms365_calendar
Source: github.com/RogerSelwyn/MS365-Calendar
Issues: Report an issue

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation.

About

Microsoft 365 - Calendar connects Microsoft 365 calendars to Home Assistant as calendar entities. It works through the Microsoft cloud and is configured in the UI with a client ID and client secret from an app registration. Actions allow events to be created, modified, deleted, and responded to, and a separate action returns events in a time range with attendees and organizer details. Setup choices include an alternate authentication method, support for group calendars, a shared mailbox, a read-only basic calendar mode, and a tenant ID for single-tenant apps. Options cover which calendars are enabled, the update interval, how many days back and forward to sync, and the maximum number of events retrieved. Start and end times can be offset by hours, and events with chosen sensitivities can be excluded.

Automatic summary of the README and code of RogerSelwyn/MS365-Calendar. Something wrong, or are you the maintainer and want your own text here? Get in touch

Supports

Uses the vendor's cloud Needs an internet connection and an account with the vendor.
From the Marketplace Installed through the Marketplace, formerly HACS.
Actively maintained Its author released or pushed a change in the last six months.

Provides

Calendars

Setting it up

Install it from the Marketplace and restart Home Assistant, then add it under Settings, Devices and services.

Connect

Uniquely identifying name for the entities
Client ID
Client Secret
Use alternate (more complex) authentication
Enable update services
Enable read only basic calendar
Enable support for group calendars
Email address/ID of 'shared' mailboxDo not put your own email address in this box
API CountryOnly use if you know you need it since your credentials will be sent to the selected api/country.
Tenant IDAzure tenant ID for single-tenant app registrations. Leave blank for multi-tenant apps.

Request default

Returned URL

After setup

Enable new calendars
Enabled calendars
Update interval in seconds
Number of days backwardsDays backward to sync to store
Number of days forwardDays forward to sync to store
Calendar friendly name
Hours to offset the end time
Hours to offset the start time
Max number of events to retrieve
Sensitivities to exclude from retrieval

Texts from the code of RogerSelwyn/MS365-Calendar.

Actions

Respond to an eventRespond to calendar event/inviteFields: Event ID, Response, Message, Send Response
Create a new eventCreate new calendar eventFields: Subject, Start, End, Body, Location, Categories, Sensitivity, Show_as, All Day, Attendees
Modify an eventModify existing calendar event, all properties except event_id are optionalFields: Event ID, Subject, Start, End, Body, Location, Categories, Sensitivity, Show As, All Day
Delete an eventDelete calendar eventFields: Event ID
Get eventsGet the events in a time range with their full MS365 detail, including attendees and organizerFields: Start date time, End date time

Troubleshooting

DiagnosticsDownloads a diagnostics file to attach to a bug report.

From the README

This project would not be possible without the wonderful python-o365 project.
I work on this integration because I like things to work well for myself and others. Please don't feel you are obligated to donate, but of course it is appreciated.

From the README of RogerSelwyn/MS365-Calendar, MIT License. Shortened.