Quote:
Originally Posted by mikelcu  I can confirm this error as late a 5.0.11. We've seen it several times, particularly surrounding maintenance windows where mail service gets interrupted for a few minutes. I think the client may fail to connect, then stop trying, leading to expired creds. Luckily for us, it's been an isolated thing but we have not found a fix or workaround. |
It very well might be that the connector is reporting this error when a mailbox is in maintenance mode. This may be a case of a poor error message. Note the connector cannot send the message until the mailbox is out of maintenance mode so it will generate some type of local fault (local NDR) until the mailbox is unlocked.