calendar-notify-service.exe

Calendar Notify Service

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What is calendar-notify-service.exe?

Calendar Notify Service runs as a background daemon that aggregates events from your connected calendars (Google Calendar, Outlook/Exchange, and CalDAV sources) and emits reminders through the OS notification system or companion apps. It caches metadata locally to improve responsiveness and supports per-calendar preferences.

Technically, calendar-notify-service polls calendar APIs using OAuth tokens, synchronizes event data, and schedules reminders by leveraging the OS notification center. It maintains a small local cache to reduce network calls and can operate offline for recently fetched events.

Is calendar-notify-service Safe?

Calendar Notify Service is designed as a legitimate background component to help you manage reminders across calendars. It runs with your user permissions, stores minimal event data locally (if enabled), and does not exfiltrate personal calendar content without user consent. It can be disabled or removed through standard system tools, and its binaries are expected to be digitally signed by the official vendor. When installed from trusted sources, it should operate without network access beyond your configured calendars and should respect privacy settings.

Is calendar-notify-service a Virus?

If calendar-notify-service is installed from an official vendor and signed with a trusted certificate, it is not a virus. However, if you obtain the binary from an untrusted source or notice unexpected behavior, it could be malicious. Always verify the developer, digital signature, and hash, and compare the binary with the vendor's published checksums. Unrecognized origins or unusual network activity warrants a malware scan and potential removal.

How to Verify Legitimacy

Check File Location: Ensure the executable is located in the expected directory: C:\Program Files\CalendarNotifyService\calendar-notify-service.exe
Verify Digital Signature: Open Properties -> Digital Signatures and confirm the signer is the official vendor Calendar Insights Ltd or the recognized signer.
Check File Hash: Compute SHA-256 hash: certutil -hashfile C:\Program Files\CalendarNotifyService\calendar-notify-service.exe SHA256 and compare to vendor-provided value.
Scan for Malware: Run a full system or targeted scan with Windows Defender or your AV to ensure no malware infection is present.

Red Flags: Red flags include an unexpected file path, unsigned or mismatched signatures, frequent network activity to unknown endpoints, or the service running under suspicious account names. If you see any of these, isolate the file and perform a full malware scan.

Why is it Running?

Reasons it's running:

Centralized calendar reminders: It consolidates events from multiple calendars and delivers reminders in one place to reduce missed appointments.
Active notification delivery: The service schedules and pushes desktop or mobile notifications at pre-configured times.
Synchronization with sources: It polls Google Calendar, Outlook/Exchange, or CalDAV sources to sync changes and new events.
User preference awareness: Reminders honor per-calendar settings, such as notification mute periods and reminder lead times.
Background operation for reliability: Running as a background process ensures reminders are delivered even if the main app is closed.

Can I disable or remove calendar-notify-service?

Common Problems

Common Causes & Solutions

: Verify that notification permissions are enabled for the app and the service is running. Check per-calendar reminder settings and ensure the system notification center is active.
: Check for multiple calendar connections or stale cache. Restart the service and clear local cache if supported. Update to the latest version to fix leaks.
: Re-authenticate calendar accounts, ensure OAuth tokens are valid, and verify network access. Review firewall rules that may block API endpoints.
: Check logs for startup errors, ensure dependencies are installed, and rollback if necessary. Reinstall the calendar-notify-service package.
: Clear cache and trigger a full resync from the settings. Confirm time zone configurations match your calendar sources.
: Verify vendor, digital signature, and hash. If not matching, remove the file and run a malware scan immediately.

Frequently Asked Questions

What is calendar-notify-service and what does it do?

Calendar Notify Service is a background component that aggregates calendar data from connected services and delivers timely reminders via the OS notification system, helping you stay on top of events.

Where is calendar-notify-service installed on Windows?

Typically under C:\Program Files\CalendarNotifyService. The main executable is calendar-notify-service.exe and related files reside in the installation folder.

How can I disable calendar-notify-service?

Open Services (services.msc) or Settings > Apps, find Calendar Notify Service, stop it, and set Startup type to Disabled. You can also uninstall the program.

Is calendar-notify-service safe to use?

Yes, when obtained from official sources and verified with a valid digital signature. Always validate the vendor and hash before installation.

What data does calendar-notify-service access?

It accesses calendar event data from connected providers (through APIs) and uses a local cache for performance. No personal messages are sent to third parties without explicit permission.

Why am I seeing an unknown network request from this service?

The service may contact calendar API endpoints to sync events. If the domain or destination looks unfamiliar, review network activity and verify the install source.