Hello. My name is***** to JustAnswer. I'm reviewing your question now, and will post back with your reply momentarily.
If it doesn't have internet, it only knows about the last password ***** have used to log in.
Can you send me the exact make/model of your tablet?
Is there any way you can get that tablet to connect to a computer or use the wifi it was picking up before to
get the network to go 'online' again?
If you can, you can change your microsoft password ***** Then connect your tablet to the network/internet
and use that password ***** get in. It will 'update' when it sees the microsoft password ***** online.