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Configuring POP in MS Exchange

Exchange POP Configuration basics

Using Exchange for POP

Disclaimer:  The following steps may be used as a general guide to configuring POP in Exchange for a production Workfront system.  The steps may differ significantly depending on the version of Exchange or bug fixes/changes to the code by Microsoft.  Hopefully these steps will be useful in your attempt to configure POP on an Exchange system.

There are 4 general steps to configure POP3 on an Exchange 2010 Server:
1) Enable & Start the POP3 service on their server. By default these are not started.
2) Configure POP3 for the server.
3) Enable or allow Users to use POP.
4) Configure Receive Connectors

More Detail: 
1) Enable & Start the POP3 service on an Exchange server. 
 
- Start Microsoft's Server Manager.
- Under Server Manager > Configuration >Windows Firewall with Advanced Security > Services > scroll to find "Microsoft Exchange POP3" > Right Click > Properties
- Under the General tab > Startup type > set this to Automatic. This will ensure the POP service will automatically start.

2) Configure POP3 for the server.
- Start Microsoft's Exchange Management Console
- Microsoft Exchange On-Premise > Server Configuration > Client Access. POP3 should be on the list under the POP3 & IMAP4 tab
- Highlight POP3 in the list > now along the right side under Actions > POP3 > Properties
- POP3 Properties > Binding Tab >  This will show all available IP Addresses and Port Numbers configured for the POP3 server. The top box showing Unencrypted
and the bottom box showing the IP and Ports for SSL/TLS connection.
- POP3 Properties > Authentication tab > should show they have selected "Secure login. A TLS connection is required for the client to authenticate to the server."

3) 
Enable or allow Users to Connect to POP.
This is enabled by Default, but here is how to confirm specifically the POP email address being used in Workfront is enabled for POP in Exchange.
- Start Microsoft's Exchange Management Console
- Microsoft Exchange On-Premise > Recipient Configuration > Mailbox
- This will show you a list of Mailboxes or users.
- Highlight the email being used within Workfront > along the right side Actions > Properties > go to the Mailbox Features tab > This should show POP3 Enabled.
- If it shows POP3 Disabled > Highlight POP3 > Click the Enable button

4) Configure Receive Connectors
- Start Microsoft's Exchange Management Console
- Microsoft Exchange On-Premise > Server Configuration > Hub Transport
- This should show a list of receive connectors. 
- You will want to confirm the receive connector Client EX01 is Enabled. Where EX01 is the name of your Exchange Server.
- Highlight Client EX01 and along the right under Actions > Properties > go to the Authentication tab and make sure at least Transport Layer Security (TLS) is checked. You may also have Basic Authentication only after starting TLS AND Integrated Windows Authentication.


A lot of the above may already be configured but, if things are not working it's a good idea to verify the configuration.
If specific problems are still happening, it may be best to contact Microsoft Support or one of their Partners for additional help.