Meeting rooms not responding to meeting invites anymore. This was working as expected for long time without any issues but suddenly users don't get any email confirmations from room resources.
I've checked the configuration of the resource mailbox but all the settings seem to be ok. Mainly the AutoAccept.
We updated our exchange 2013 server to the latest version about the month ago but this was working after and the first reports of this issue occurred just last week.
I have to mention that we are running hybrid exchange 2013 configuration with Office 365. Resource mailboxes are located on premise. Some users mailboxes were migrated to Office 365 and some are still located localy. I've checked all log files as well as the Event Viewer but couldn't find anything obvious.
Has anyone experienced a similar issue? Any advice would be highly appreciated.
Thank you, Chris