Users PW Incorrect Despite Correct PW

This morning - I noticed 2 users were having issues logging using their AD credentials. I originally thought it was an issue with their account being locked out. After investigating, I noticed their user name was their email with an * beside it.

What causes this and is the resolution for allowing them to login?

These are the errors in the logs for the 2 users. The only thing I did was move them to a different group this AM.

2019.07.29 12:17:43 WARN [pool-36-thread-4]: org.jivesoftware.openfire.session.LocalOutgoingServerSession[Authenticate local domain: ‘cmcu.org’ to remote domain: ‘svr-chat’] - Unable to authenticate: Fail to create new session.
2019.07.29 12:17:43 WARN [pool-36-thread-4]: org.jivesoftware.openfire.session.LocalOutgoingServerSession[Create outgoing session for: cmcu.org to svr-chat] - Unable to create a new session: Dialback (as a fallback) failed.
2019.07.29 12:17:43 WARN [pool-36-thread-4]: org.jivesoftware.openfire.server.ServerDialback[Acting as Originating Server: Create Outgoing Session from: cmcu.org to RS at: svr-chat (port: 5269)] - Unable to create a new outgoing session
2019.07.29 12:17:43 WARN [Server SR - 24254602]: org.jivesoftware.openfire.net.SocketReader - Closing session due to incorrect hostname in stream header. Host: svr-chat. Connection: org.jivesoftware.openfire.net.SocketConnection@1f330ed socket: Socket[addr=/10.50.10.123,port=55708,localport=5269] session: null
2019.07.29 12:17:43 WARN [Server SR - 25660606]: org.jivesoftware.openfire.net.SocketReader - Closing session due to incorrect hostname in stream header. Host: svr-chat. Connection: org.jivesoftware.openfire.net.SocketConnection@892e4b socket: Socket[addr=/10.50.10.123,port=55707,localport=5269] session: null
2019.07.29 12:17:42 ERROR [socket_c2s-thread-11]: org.jivesoftware.openfire.roster.Roster - Groups ([Openfire - Branch Admin, Openfire - Mortgage]) include non-existent username (dwashington)
2019.07.29 12:17:42 ERROR [socket_c2s-thread-11]: org.jivesoftware.openfire.roster.Roster - Groups ([Openfire - Member Services, Openfire - Mortgage]) include non-existent username (lellerbee)