I have an issue with pop3 logins in an Exchange 2010 DAG environment. WE have two servers holding the Mailbox Server role and one holding the CAS and Hub Transport roles. The passive Mailbox server is in another site, there is no firewall in between.
Everything works fine when mailboxes are on the active mailbox database but were failing recently. Upon logging into the Exchange Management Console we noticed that the Exchange server had failed over to the copy mailbox server. Once we moved the active copy back the the original server pop3 logins worked again.
To test I have created a single instance database and mailbox on the passive copy server and pop3 logins fail with the error "-ERR Login Failure. Unknown Username or password"
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center.
Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center.
Navigate to the Servers >> Certificates…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online.
The email signature template has been downloaded from: