When using IE to open OWA you are able to use the developer tools by pressing F12, which could provide me some more information about the issue.

Using Outlook I am not able to see what is going wrong by requesting the free/ busy information, so I wanted to use OWA. It made no difference the online user was not able to see free/ busy information from a local user.īecause there are a lot of components and settings involved in the Hybrid Exchange setup I switched over to collecting some information from the (online) user side. I even added the domains to the default on-premises SharingPolicy. I had a look at the SharingPolicy to compare the on-premises policy and online policy. I first had a look at the Organization Relationship by running Get-OrganizationRelationShip | FL from the local Exchange Management Shell and Exchange Online PowerShell.Įverything looks fine, from the Exchange on-premises and online output. As you can see, there is no information displayed of the on-premises mailbox. Below a view from the calendar of Test User01, which is already migrated to Exchange Online, trying to see the calendar information from Test User03 (an on-premises mailbox). But users with an online mailbox were not able to see the free/ busy information from the on-premises users. Next thing to check was the calendar sharing, are the on-premises users able to see free/ busy information from online users and vice versa? Well, users with an on-premises mailbox were able to see free/ busy information from mailboxes running on Exchange Online. I was able to set delegates on the mailbox, cross-forest Full Access rights did work as expected. It was now time to have a look at the user experience. We did some tests like the mail flow, by validating the outbound connector, performed a successful migration of a test mailbox etc. The Office 365 Hybrid configuration run without any issues. Last week I started the setup of an Exchange 2010 Hybrid configuration at a customer, to start a pilot with Office 365/ Exchange Online.

Microsoft calendar control 2007 missing