MS Exchange stops syncing after 30 days

[AC Question]

I have a Galaxy S4 mini and a Galaxy Note 8 both on 4.4.2 both using MS Exchange for my corp email account. On the S4 mini my email stops after 30 days. I have to delete the account and reinstall it to go a few more weeks while the account with the same settings on the Note 8 keeps on working.The only difference is the email is grouped by date on the S4 mini but is just in date time order on the Note 8.