Glen's Exchange and Office 365 Dev Blog

One of the recent additions to the Graph API for Exchange in Office365 has been getSchedule action https://developer.microsoft.com/en-us/graph/docs/api-reference/beta/api/calendar_getschedule . What this action allows to do is get the FreeBusy information from one or more mailboxes in your Office365 environment. If your new to Exchange (or for those that have forgotten) FreeBusy information is essential what is used to produce the Schedule Assistant in Outlook and equivalent in OWA The above is built by Outlook using the EWS GetUserAvaliblity operation which is what the getSchedule action in the Graph is the equivalent of. GetUserAvaliblity has been in use in Outlook since Exchange 2007 where we went from using Public Folders to hold the freebusy information in previous versions to the Public Folder free utopia we have today. In the preceding years features such as Suggested Meeting times have been added to this EWS operation this feature is available in the Graph via the Graph i...

In the past I've posted scripts for a Free-Busy Board and an OOF Board which uses the EWS Managed API and PowerShell. The following is a combination of the two that displays the OOFStatus of the user combined with their FreeBusy and Calendar Appointments in a Tabbed based output eg To build the list of Mailboxes to create the Tabs the script uses a Distribution list and the ExpandDL operation which will retrieve a collection of SMTP address's for the members of the group. It then uses the GetUserAvailblity operation and MailTips operation to build the output. To run the script you need to use the SMTPAddress of mailbox you want the script to run as and the SMTPAddress of the Distribution list to expand. eg fbooftabs.ps1 user@domain.com dl@domain.com I've put a download of this script here the code itself looks like $tbRptSourceHeader =@ '   <!DOCTYPE html>   <html lang="en">   <head>   <style>   body...

In this post I'm going to continue looking at the special operations in EWS that allows you to get and set the unconventional data that is stored in an Exchange mailbox like the FreeBusy information and the Out of Office Message. First off lets look at the FreeBusyTime.   Getting Freebusy time Freebusy information is one of the more useful calendar features that Exchange offers in EWS the ability to access the freebusy information is provided by the GetUserAvailiblity operation . This operation can be useful in a number of scenarios especially when you may want to query a large number of calendars. One example is a freebusy board or meeting room website When you make a FreeBusy request there are two constraints on the request that are outlined in http://technet.microsoft.com/en-us/library/hh310374.aspx   "By default, Exchange 2007 accepts availability requests for 42 days of free/busy information and Exchange 2010 may request 62 days of free/busy information. If ...