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The easiest and most effective way to control this is at the firewall level. You can do this for individuals or the entire organization. You will also be able to see what people are trying to attempt to make connections to their gmail using pop or imap etc. <br />
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Will.
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The easiest and most effective way to control this is at the firewall level. You can do this for individuals or the entire organization. You will also be able to see what people are trying to attempt to make connections to their gmail using pop or imap etc.

Will.

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ended up using GPO. &nbsp;Thanks.
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I have found that some of my users have been setting up secondary email in their outlook such as gmail, yahoo, etc. &nbsp;They are only authorized to use exchange email. &nbsp;How can I prevent this from occurring?
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I have found that some of my users have been setting up secondary email in their outlook such as gmail, yahoo, etc.  They are only authorized to use exchange email.  How can I prevent this from occurring?

I need to prevent users from creating new email accounts in outlook 2013

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.