thank you very much for your question. My name is***** and I will try to help you as quick possible. Please sit back for a moment while I prepare your answer.
Can you please let me know the error you are receiving if you try to start Outlook?
Thanks for your patience and best regards,
You are not the first one reporting this since the "Sierra" update actually. It has a lot of problems unfortunately. Have you already rebooted your Mac?
OK, I see! Which update was it and when was it installed? If you wish, I can take a look via a remote-assistance as you´ve requested. Do you want that?
It´s just because you´ve requested that from me:
"(Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Secure Remote Assistance. Let me know if you need more information, or send me the service offer(s) so we can proceed."
And it is a good idea actually, because I would need to see the problem to really understand and fix it.
I can´t help with that problem via text as I can´t analyse your system to find the problem. I will open your question to other experts. Good luck.