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Outlook Classic opening Outlook Web App
Do you use the Outlook application or via a browser?
Why is Outlook on the Web, Microsoft Outlook (Desktop Applications) so bad?
Outlook Desktop or OWA for your users?
I have had a few separate clients today experiencing the same issue.
When opening emails in Outlook Classic (Desktop App), all of a sudden they're being redirected to OWA on their web browser. The email doesn't make it to the reading pane; it just swaps to browser.
I temporarily stopped it by resetting default app/shortcut settings to Outlook Classic and uninstalling Outlook New, but it has since started happening again.
Is anyone else experiencing this or something similar?
EDIT**
This seems to only affect Outlook profiles using multiple mailboxes (Thanks u/Dolbs)
Plenty more people having this issue today, here is my temp workaround (So far, it hasn't come back):
Close Outlook
Delete "%localappdata%\Microsoft\Outlook\RoamCache" and restart Outlook
Restart Outlook, test by clicking into each separate mailbox