Failed attempted logins

Community Explorer

Good morning all,

I am new to Canvas as I was Blackboard learn  back end  admin for last  15 years.  Currently I changed jobs from Higher Ed to k-12. my current employer uses canvas for middle/high schools. We have been  experiencing a strange behavior since the start of the school year.  Students/Faculty  have to try several times  before they can login. 

Canvas is hosted and AD is used for authentication.   Any suggestion?