Ive gone through all the documentation i can find (this one is fantastic https://www.youtube.com/watch?v=bMYA-146dmM&t=609s )

But for the life of me I cannot get POP3 to work.

IMAP etc works fine. But its just plain not authenticating, I'm sure its something simple, but nothing is glaring out .

Im using MailKit.Net.Pop3 to do the connection,

var oauth2 = new SaslMechanismOAuth2(Email, Token);
using (var client2 = new MailKit.Net.Pop3.Pop3Client(new ProtocolLogger("pop3.log")))

//client2.AuthenticationMechanisms.Add("XOAUTH2");  
await client2.ConnectAsync("outlook.office365.com", 995, SecureSocketOptions.Auto);  
await client2.AuthenticateAsync(oauth2);     <-----  Error MailKit.Net.Pop3.Pop3ProtocolException: 'POP3 server did not respond with a +OK response to the AUTH command.'  
var UIDs = client2.GetMessageUids();  
await client2.DisconnectAsync(true);  
The JWT has this scope:    
"roles": [    

    "Mail.ReadWrite",  

    "POP.AccessAsApp",  

    "Mail.Read",  

    "Mail.Send",  

    "IMAP.AccessAsApp"  

As said i can use the same Authentication on ImapCLient and is totally fine.    
THe User has Pop3 enabled for the Email account, PLEASE HELP !!!    
I really dont wat to rewrite loads of apps away from POP this close to switch over from Microsoft !!    
This is the log results:    
S: +OK The Microsoft Exchange POP3 service is ready. [TABPADQAUAAxADIAMwBDAEEAMAAzADAAOAAuAEcAQgBSAFAAMQAyADMALgBQAFIATwBEAC4ATwBVAFQATABPAE8ASwAuAEMATwBNAA==]    

C: CAPA    

S: +OK    

S: TOP    

S: UIDL    

S: SASL PLAIN XOAUTH2    

S: USER    

C: AUTH XOAUTH2