Hi
I have a program run as window service.
every 15s check mailbox, if new mail arrived, download it

We upgraded EAGetMail from 4.6.5.5 to 5.2.5.6
because changing login with basic auth to OAuth2.0

I login O365 account and saved token in txt like your sample project
I could access the mailbox and download it correctly (using same token),
But it failed after serveral minutes, I got A004 Bad User is authenticated but not connected
after that every connect got A002 NO AUTHENTICATE failed.

re-login could work another 5-30 mins, but it need login manually.

Is there something need setting? or other method to access mailbox?
Please help, Thank you

do you refresh the token by refresh token? Please email to our support email address for assistance.

OK, I refresh token and it work again,
Sometime it still got Error A004
so I refresh the token even it not yet expire.
Thanks for help

I have a script that runs every 10 minutes or so that connects to O365. Occasionally this error pops up and typically it works again on the next run.

While I haven't found the cause of the error yet, one theory is that it is related to a throttling of the service by Microsoft. This is something we have experienced with O365 in the past, although with different symptoms.

If I find an explanation or solution I will post it here.