Exchange mail very slow on OS X yosemite

Question

Often when a system update comes out, Mail is the culprit in each release. This release is no exception. I updated to OS X Yosemite and accessing my emails through Mail is painful if not nearly impossible. Exchange connects without error and syncs up all services without a problem - except Mail which is constantly pushing requests to Fetch information from the server, constantly syncing. As a result it means I can't read my email let alone reply to them.
I removed my exchange account and delete my Mail cache and local folders, readded the account, but still no joy.
IS anyone else have issues with this or simply me ?

Answer 1

I have a similar problem. Mail is very slow performing actions on Exchange server such as deleting mail, fetching mail. It is very slow even sowing the rainbow spinner often when performing an action. This is an upgrade from Mavericks on a Mac Mini (late 2012) with a 2.6GHz i7 quad core CPU. It is connected to an Exchange Server 2010. When I use connection doctor it takes a very long time to show a connected message.
I have tried deleting the account and re creating it but the problem persists.
The issue does not exist on Airmail 2 connected to the same Exchange Server on the same computer nor does it happen on an MacBook Air 11 (mid 2012) where the Yosemite install is an upgrade from Yosemite Beta 6.
Any ideas how to fix this?