I spend a lot of time in Outlook in-flight where the connection is spotty. For years, I’ve noticed the UI often freezes for several seconds, sometimes longer, if it loses connection with Exchange while syncing. I don’t understand why the Exchange sync isn’t asynchronous — other MUAs like Thunderbird and mail.app don’t behave like this. I’ve always wondered if this is normal behavior for Outlook and/or if there is any workaround, short of working completely offline and then periodically manually going online to sync recent mail.
I do have cached exchange mode enabled and cache all my mail locally.
I’m currently using the latest build of the O365 Desktop Application on Win10 22H2, but have seen this issue for 20+ years.
