i have been using outlook for over a month – i just accessed it at 6 am this morning – why is there a problem 6 hrs later?

i was swithched over to outlook about a month or 6 weeks ago and did not like it but i am livig with it. i just was on my account this morning at @ 6 am and all was fine. now i cant access it cause u say my phone is not verified or something to that effect. what is going on? i have more than one account with outlook and am able to acess those but not the *** Email address is removed for privacy *** which is my really important account! please get this fixed asap. i have dated material that has to be dealt with today or i lose money!