PowerShell – How to access Exchange Online Resource Mailbox Calendar

We are using the EVOKO Liso booking system, that is linked to Office 365 – Exchange Online

Where each meeting room has a tablet to book the rooms or equipment

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Once booked on the Tablet it shows in Outlook, or the other way around.

If booked in Outlook it shows on the Tablet hanging on the wall beside the meeting room Smile

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Fiarly easy to use and manage ..

But how to get access to the Exchange Online Resource Mailbox Resource Calendar

Or have a quick access to all bookings now and in the future Sad smile

SOLUTION :

First you need to check if the Resource Mailbox has the status PublishEnabled

Run this Powershell command and check the property : PublishedCalendarUrl


Get-MailboxCalendarFolder -Identity ResourceMailboxEmail@YourCompany.com:\calendar

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If this is blank you need to set the Recourse Mailbox to PublishEnabled

Run this command to change it :

Set-MailboxCalendarFolder -Identity ResourceMailboxEmail@YourCompany.com:\calendar -PublishEnabled $true

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Run the Get-MailboxCalendarFolder command again to check the result and copy the URL

You can also configure it using the OWA web interface


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You can also set the permissions here, where you define the view permissions

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Don’t forget the set the correct timezone / date and time format … for each resource calendar !

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TIP :

The URL exposed is not 100% correct in order to use it, you need to change it to HTTPS://….

At least now you can have a nice DAY / WEEK or MONTH overview  Smile

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Keep in mind that it can take up to 24 Hrs to sync all of the intermediate changes in the calendar.

Exchange Online Calendar in SharePoint Online :

This is not supported see here  Sad smile

When you configure it all looks OK but there is an error message shown on top.

– Outlook Web Access URL : See above MailboxCalendarFolder : https://outlook.office365.com/owa/calendar/cef36771d9a042ec9d683890b1902915@……

– Exchange Web Service URL: https://outlook.office365.com/EWS/Exchange.asmx

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Error :

The HTTP request is unauthorized with client authentication scheme ‘Ntlm’.

The authentication header received from the server was ‘Basic Realm=””‘.


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But if you click the Overlay button it works by jumping to the Exchange Calendar Web Page.

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Enjoy !!

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