Topics Map > Features and Functionality

Microsoft 365 - Free/Busy lookup between UW System/Schools/Colleges and UW Health

We continue to improve calendaring interoperability between different Office 365/Exchange systems across UW System campuses. You now have the ability to view free/busy (also known as calendar availability) information for scheduling purposes.

Important: the information in this document pertains to accounts in UW-Madison's Office 365 system and the external Office 365 systems mentioned below.

Which UW System/Schools/Colleges does this work with?

  • UW-Eau Claire
  • UW-Green Bay
  • UW-La Crosse
  • UW-Milwaukee
  • UW-Parkside
  • UW-Platteville
  • UW-River Falls
  • UW-Stevens Point
  • UW-Stout
  • UW-Superior
  • UW-Whitewater
  • UW-Colleges & Extension
  • UW-System Administration

Which other organizations does this work with?

  • UW-Health
  • Morgridge Institute for Research

How do I access free/busy information of a user?

When creating/modifying a calendar event, add the address of the user (anyone from the above systems) to the attendee field - the information under this user's name/address will either show "free" or "busy" for the time designated in your event. This will allow you to view their availability prior to sending them the meeting request.

Can I subscribe or add the calendar of one of these users to my calendar view?

No. Since these users are external to UW-Madison's Office 365 system, the only way to subscribe or add the calendar to your calendar view is to have this user either share their calendar with you or provide a public link to you.

Can I share my calendar with a user which is external to UW-Madison's Office 365 system?

Yes. You can either use the calendar permissions or publishing processes to share your calendar with external users. Note: External users will only be able to view your calendar - they will not be able to edit any events.


  • Free/Busy lookup is only available between UW-Madison's Office 365 and the systems above. The availability of this feature may not be an option between the systems listed above (e.g,. UW-Stout and UW-Extension).
  • We continue to work with UW-Whitewater and UW-Oshkosh in setting up this calendaring partnership.  Additionally, several of the UW-System institutions are in a state of transition to Office 365, so calendar free/busy lookups may not work with all recipients in those institutions.

Keywordsmicrosoft office365 o365 m365 microsoft 365 calendar federated free busy lookup scheduling schedule meeting invite attendee calendaring uwsystem uwcolleges availability interoperability federation share public link external system   Doc ID57908
OwnerO365 S.GroupMicrosoft 365
Created2015-11-02 13:49:52Updated2023-02-02 09:22:57
SitesDoIT Help Desk, Microsoft 365
Feedback  0   0