Enabling SSL and 128 bit Encryption

[cj7owner]

I am fairly new to SSL and exchange, We are running Server 2003, with users mostly running Office 2003, some are on older office apps. (office 2000)

I have POP users as well as normal exchange users. We have setup 2 virtual smtp servers, I have the SSL certificate enabled on the POP virtual server and one of the SMTP virtual servers (for POP users).

Right now I have 128 bit encryption unchecked for both POP and SMTP virtual servers. I would like to implement 128 bit encryption - Is there any changes on the client side that need to be done for the POP users?

If I implement SSL and encryption for exchange users I s there anything that needs changed on their machines?

thanks