My email setup was godaddy pre-Office 365. I never, well hardly ever, logged in and used the web interface. My local setup was my Android phone and my desktop Microsoft Outlook. The phone was basically read-only unless I was on the road. My desktop Outlook had a retention policy of Keep mail on server 100 days.
After the 365 migration every message on the server appeared at my end as new mail. My phone said 'you have 999+ new messages'. That sucks.
I logged in to the web interface and marked all messages in my upstream inbox as read.
When I finally went to my desktop Outlook and hit Send and Receive all folders it downloaded the last 100 days of my mail, that's 2800+ duplicate messages, as new mail and sprinkled them throughout my local Outlook folder scheme.
I called the helpline and the associate ('Michael', a nice enough and knowledgeable guy, with roosters crowing in the background) and his advice was to manually go through and delete the duplicate messages. Godaddy could offer no compensation for the inconvenience at my end.
This will cost me a few hours of my time searching a few hundred folders for duplicate messages and deleting them. As crappy as that sounds I'll probably do it to keep my local Outlook intact. Needless to say, I'm not thrilled.
Godaddy did not exceed my expectations in this instance.
