Hi @Shweta Mathur , thanks for your answer.
I forgot to say that I've the same problem with localhost and in production.
If I wait long enough ( 1-2 days ) , I can sign in with my microsoft account again. But if I logoff, I can't resign in.
( for me it looks like a problem of cookies ? )
I'm not a specialist , your answer stays the same even with those new infos ?
There's another way to implement a MS sign in ?
Thanks !