When you create a meeting schedule for number of days , you will see an error "This resource doesn't accept meetings longer than 1440 minutes". By default the mailbox or room was set for a maximum limit of 1440 minutes. Here's how you can disable this limit. Login to the Office 365 Administration Console In Microsoft Office 365 Exchange, click on Manage . In Manage My Orgnization , click the drop down arrow, and click on Select on Another User . This will prompt you to select the mailbox or room to manage. Select a Mailbox or Room , click OK . In Option, click on Settings. In Scheduling Options, un-check the "Limit meeting duration", then click on Save. That's all. You can now schedule a meeting or reserve a room for number of days. Hope this help you. If this helped you, please take the time to share this post by sharing using Google+, Facebook, Twitter, or LinkedIn