I have to say, that given the resources that Microsoft has and the longivity of the product, outlook has to be one of the buggiest, unreliable softwares that I use. The Preview pane, constantly resets, the ribbon dissapears, indexing stalls, it crashes often, blocking senders rarely works and entering times and dates on tasks and appointments can be a challenge and so complicated that even the support staff can't find out why it works the way it does. Outlook is only half-baked and they really need to start focusing on the many areas which were just left as "good enough" and moved on. I've been using desktop for 40+ years and it has only gotten worse over that time it seems. I'm now on 365 home desktop. It doesn't even sync with Android calendar without an add-in, which put me back over $100. Unbelievable!