The Following Messages is posted on Office 365 Admin Console by Microsoft:
Current Status: Our configuration change has been effective in reducing the impact from this issue. We're deploying this configuration across the affected infrastructure now. Over the next 24 hours, the change will take effect and begin reducing latency. In parallel, we're continuing to investigate the underlying root cause of the issue and develop a permanent solution.
User Impact: Calendar meetings are not being automatically processed in a timely manner via the Auto-Accept feature from some resource mailboxes (such as conference rooms), which is affecting users' ability to set up calendar meetings.
Scope of Impact: A few customers have reported this issue, and our analysis indicates that impact is specific to accounts hosted on the affected infrastructure.