Checklist Before a Client Scheduling Assistant Check
16 October 2026
Run through this checklist before a client scheduling assistant check so your external commitments appear occupied. You manage two calendars across separate organizations. Your client sees only what exists inside their own Microsoft 365 tenant. Verifying your settings prevents a coworker from booking over your existing commitment.
To make hours show as occupied, verify that your client calendar holds a real native event marked Busy for every outside commitment. Do not rely on subscribed calendar feeds. Check that your time zones match. Confirm your status is not set to Free. Ensure the blocking event sits directly on your primary work calendar.
- Verify the event sits on the primary mailbox calendar. Open your client calendar interface. Confirm the blocking entry sits on the default primary calendar. Secondary calendars never register inside Outlook Scheduling Assistant.
- Confirm the Show As status is explicitly set to Busy. Inspect the event details. Verify the Show As status is set to Busy or Tentative. An event marked Free leaves the grid open for bookings.
- Check matching time zone configurations. Open your calendar settings in both accounts. Ensure your primary calendar and secondary account share the exact same active time zone. A mismatch shifts the blocked period by hours.
- Audit for read-only ICS subscription links. Check your client Outlook folder list. Confirm you did not rely on an added Internet Calendar. Read-only web links never feed tenant free/busy lookups.
- Test availability with a colleague or test account. Ask a coworker in the client tenant to look up your name in Outlook Scheduling Assistant. Verify that your committed hour shows as Busy.
Who this is for
This checklist is for you when you manage two calendars across separate organizations.
You must keep a client Microsoft 365 tenant account accurate while working on your primary calendar.
The pre-meeting checks to protect your schedule
Your client checks Outlook Scheduling Assistant or Google Find a time inside their company environment.
They do not inspect your external accounts before sending an invitation.
Your client expects an open slot on your tenant calendar to represent true availability.
You must ensure your real commitments match what their calendar view reports.
Review these checks whenever you take on a new contract.
The one check that fails most often
The check that fails most often involves subscribed web calendars.
You might import an ICS feed from Google or another tenant into Outlook.
An ICS subscription creates a secondary calendar in Outlook.
You see that secondary layer on your own screen.
The tenant free/busy service completely ignores secondary feeds.
When an organizer opens Outlook Scheduling Assistant, the service queries only your primary default calendar.
It never evaluates secondary or web-fed calendars.
Your client scheduling grid displays your hours as open if you rely on an ICS feed URL.
Questions
Why does Outlook Scheduling Assistant ignore subscribed Google calendars?
Microsoft 365 free/busy queries read only the native Exchange mailbox calendar folder. Subscribed internet feeds live in a separate user display cache that the scheduling engine never queries.
Can I simply forward calendar invites to my client address?
Forwarding invites exposes meeting descriptions, client names, and confidential links to another company. You also must accept every invite twice across different accounts.
Does marking an event as Private still show me as Busy?
Yes. A private event hides the subject and attendee details from coworkers while maintaining a Busy status on the scheduling grid.
How quickly do changes update in a client tenant scheduler?
Native calendar events update immediately within the same tenant. Automated sync events appear as soon as the background sync writes the entry to the target mailbox.