I have been waiting 10 years for a unified inbox in outlook on windows. I use outlook 5 hours a day with 10+ mailboxes (I am a consultant for several companies)
So about 5 years ago, I switched to mac, just because Apple outlook has unified inbox, sent mail etc.
Now My mac is getting too slow and too full (they come with small SSDs and no upgrade options). I don't want another mac, I want to buy a windows pc, but cant, as outlook on windows has no unified box.
In 10 years of office upgrades and new versions, they have not implemented a single useful new feature (for me as an IT professional anyway). I would go so far as to say I would not notice the difference in functionality between office 2010 and the currently
office 365. In 10 years they could have added the one critical missing feature. I can only assume that Microsoft do not add this feature to force people with many active mailboxes to buy Macs to run microsoft office. Perhaps Apple pay the Microsoft Office
team in brown envelopes to keep the windows version of outlook crippled?
I have tried all the unified inbox hacks. None work properly.
If I was a microsoft developer, I would create an outlook plugin which implemented unified inbox and sent mail box and make a fortune.