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Slow MAPI connection from Win Live Mail to Exchange 2010

I have 2 users who is experiencing slow connection speeds to our exchange 2010 server using MAPI on Windows Live mail. The access the mail remotely and have a good internet connection. They received the following error intermittently: 'Your IMAP server has not responded in 300 seconds. Would you like to wait another  300 seconds for the server to respond?' but complain the the service is poor most of the time.

They used to POP and plan to move to Outlook Anywhere in a couple of months and as a interim measure we moved them to MAPI on Win Mail.

1. Is MAPI know to be slower than Outlook Anywhere?
2. Are there any setting in Exchange that could speed things up?
3. Are there any client side setting that could speed things up?
3. Is there any advantages to move all client that currently use POP or MAPI over to OWA or OA?

1 Solution
1. They should both be the same, Outlook anywhere maybe a little faster for clients tho (emails are downloaded in the background so you get an Oulook full  client experience)
2. Have a look thru the event logs, and also run MAPI internaly do you still see the same speed problems?
3. Check the server before you change things, but try other mail problems like Thunderbird see if that is any faster
4. POP and MAPI are old "stupid" protocols, they are ok for a simple mailbox, but with Exchange you have many more features like public folders, shared calanaders/contacts etc. I would have users use OWA over pop or imap (especialy with Exchange 2010 because you get the full OWA experience in better browsers like Chrome/FireFox)
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