Hotmail keeps asking for credentials on android phone

I have the Blackberry Hub and associated apps (password keeper, calendar, mail etc.) Installed on my android phone. For the last week when I open mail, I get a pop up asking me to verify my credentials for my hotmail account. It takes me to the account management screen where I have to enter my password. When I do so, I get the same pop up asking for credentials again. However, at certain points during the day, the account works fine and I get mail. This has happened before, but either entering my password worked, or it corrected itself the same day or next. I also have my Gmail and Sympatico email accounts in the Blackberry mail hub, as well as text messages, WhatsApp and Instagram . They all work fine. Since many other ppl have had the same issues with their hotmail account, it's definitely not the Blackberry Hub and Services that are causing the problem. Since you are in the process of transferring Windows mail to Outlook, which will affect hotmail accounts but not gmail etc., I'm wondering if this is the problem. My hotmail account works in Outlook and when I log in on the internet. I don't have a problem switching my hotmail account to Outlook, but I still want it to appear in my Blackberry mail hub.