Hi,
It's the correct page response "EndPoint not found", if you try to access the https://office365servicehealthcommunications.cloudapp.net/shdtenantcommunications.svc
page.
The blank username and passwords are Ok as well, but be careful to edit your credentials from the subscription page, as they are not changed in this case in the Office365 Run As Account, looks like a bug. Therefore, edit them only through
the Accounts menu, or create a new subscription.
The management pack communicates exactly to the mentioned above page only, it's not possible to use IPs, as they could be changed at MS servers side. The host should be whitelisted in case if you have firewalls\proxy. At the same time, depending
on your network\proxy\subscription configurations, possible issues could exist because of certificates and authorization at different levels.
In case of proxy - the Office 365 Proxy Run As Account should be configured. It's automatically created during installation of MP, but the account with Internet access should be added there. Take in attention that using the Office365 Run As
Account does not work out. Therefore the separate Windows account should be created and used as the Office 365 Proxy Run As Account, even if it's the same as the Office365 Run As Account. When using the proxy account, one of the Monitoringhost.exe
processes works under this account. If the proxy account is not configured, this process works under the system account. The proxy account was not documented in Office365 MP manual.
Don't change the default name of created Office 365 Run As accounts, somehow it affects the connection monitor.
Hope it helps :)