I recently set-up my Zoho mail account using IMAP so that I could view my emails on my iPhone (iOS 5.0). I was happy to see that using IMAP all my mail was synced. I then saw that Zoho had come out with Zoho Sync using MS exchange server. Excitedly I added my account using the Exchange Server and found that everything was again in sync.

One draw back remains. Using the Exchange Server there is no way to mark/flag messages on the iphone. Whereas before using IMAP I could 'flag' messages on the iphone which reflected on the server, using the Exchange solution there is only an option to 'Mark as Unread'.

Is there a way to get the 'flag' option back for the iPhone using the Exchange Server?