SmarterMail Enterprise: 
After upgrading to Build 8524 (May 4, 2023), IPhones using WebDav is not working on several IPhones.

We have deleted the Calendar Accounts and tried to add them back. 
Error: Cannot Connect Using SSL. (we have tried with SSL 443 and without SSL 80) 

Error: CalDAV account verification failed.

We have looked at all the doc and followed the tips, but nothing as worked.

These accounts have had no issues for over 2 years.