The longer you work with Veeam Backup & Replication, the lower and lower its interface work. Apparently, this is because Veeam stores in database information about all sessions of the interface. Once they become so numerous that queries to the database begin to slow down.

So we need:

1. Set up Veeam to not to store all this unneeded information.
2. Delete existing data from database.
3. Truncate and shrink database.

After performing these steps, my Veeam client started to work much faster.

Exchange 2010 and 2013 partially managed with Exchange Control Panel (ECP). It's a web-service running on IIS on Client Access Server. There is a problem: when you publish OWA in the Internet, you automatically publish ECP to the Internet too. And this is a security issue.

If you use IIS ARR as Reverse Proxy for publishing Exchange to the Internet, you can create rule that will block access to URLs like https://owa.domain.com/ecp/.

Recently MDaemon that installed on Windows Server 2003, ceased to send or receive messages from\to some mail servers. As it turned out, the problem is in the obsolete SSL\TLS protocols on Windows Server 2003.

Symptoms (cut from log):

In QNAP storages you cannot change or reset password for iSCSI target using web interface. You can only delete target and create it again. Of course you will lose all data from target.

Fortunately, password stored in plain text in /etc/config/iscsi_trgt.conf file, field CHAPPasswd. There is field for CHAP user also. You can connect to the device using Putty and find password without need to reset the whole target.