What's going on with WPS email?

I've heard from several teachers who've been having trouble getting into their email this past week. Today, the School Committee received the following from IT:

Over the recent holiday break, the IT department installed a new email server for the district. to date, we have migrated over 1,100 accounts to the new email server. Those on the new email server should find the service very fast. Those not yet on the new email server will still experience delays. We are migrating over 100 accounts per night to the new email server, but the size of the mailboxes is causing the process to take additional time. We expect to have every email account moved over in the next several weeks. While accounts are being moved over, the user will experience some down time. We are only moving accounts after regular school hours to reduce the load on the current email server. 

Currently, the best way to access email for every user is using Webmail. The Webmail interface works better than Outlook right now, so all users will likely see better performance using Webmail. Once all are moved over, the experience for everyone should be much better.