![[How-to] Block Cryptolocker at Exchange/Office 365](http://35.204.150.161/content/images/wordpress/2017/03/032917_1223_HowtoBlock13.png)
Office 365 and Exchange Online has a market adoption over 70% in enterprises. An easy way to block cryptolocker viruses that come with mail attachments is to block executable files in Exchange Admin Center. There is no reason to receive executables by email. The solution below will block executables in Exchange environments, including in zipped files. Logon to the Exchange Admin Center: With Exchange 2010 and 2013/2016 go to the URL https://<FQDN of the mailserver>/ecp i.e. https://mail.brankovucinec.com/ecp. In Office 365, go to the admin portal and click Exchange in the…
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Today I was instructed to help our company Systems Administrator with a problem of “Send on Behalf”. It appears that some users could send mails on behalf of other people, but those users didn’t have the rights set within the Exchange Admin Center, as seen in the screenshot below. So, how is it possible that those users could still send mails on behalf of others in our organization? It looks like the problem resided in our migration path from Exchange 2003 to Exchange 2007 and a few years later to Exchange 2010 and we are in…