SuiteCRM-7.13.2 -Microsoft Oauth Connection -Token not getting refreshed automatically

HI ,
I am using SuiteCRM-7.13.2.I have setup Microsoft Authentication Provider/Connectors .It was successfull.Inbound Emails Authentication also tested successfully.
However ,Tokens in connectors are not getting refreshed automatically after getting expired.We need to authenticate manually everytime.

Need your support

The same problem too, I even tried to change ‘expire in’ in external connection, but still failed.