Outlook for Office 365 Hanging / Freezing

[Andy_PIT]

Anybody having issues with Outlook for Office365 hanging for around 10-15 seconds when opening messages?

Problem is both for Personal Mailboxes (cached mode) and for Shared Mailboxes (online mode), i've got a around 10 users with the issue.  PC has had a fresh install of OS and Outlook, and also used different internet links but the problem remains

[#2]

Seems to be fine here, but if you can reliably reproduce the issue, open a support case to get it properly investigated and escalated.