Enable/disable Exchange Server 2013 circular logging:

https://technet.microsoft.com/en-us/library/dn756374(v=exchg.150).aspx


Enable/disable Exchange Server 2007 circular logging:

https://practical365.com/exchange-server/ems-enabledisable-exchange-server-2007-circular-logging/


http://geekswithblogs.net/marcde/archive/2013/08/09/enabling-circular-logging-in-exchange-2013.aspx


Moving Transaction logs:

http://woshub.com/how-to-move-and-truncate-logs-in-exchange-2013/



Clearing out the log files:

https://social.technet.microsoft.com/wiki/contents/articles/31117.exchange-2013-logging-clear-out-the-log-files.aspx

Script for clearing out logs:

https://gallery.technet.microsoft.com/Clear-Exchange-2013-Log-71abba44/view/Discussions#content