| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | “Cannot connect to DMCI server” | Firewall blocking port 1435 | Open port on Windows Firewall and any hardware firewall. | | Outlook crashes when opening calendar | Corrupt DMCI profile | Create a new Outlook profile and reconfigure DMCI. | | GAL not updating | Sync interval too long | Force sync via DMCI → Synchronize → Global Address Book . | | Meeting requests stuck in Outbox | Permissions issue | Re-request permissions on the target calendar in MDaemon WebAdmin. | | High CPU on MDaemon server | Too many concurrent DMCI sessions | Reduce “Maximum DMCI connections” per user. | | Offline folder errors (OAB) | Corrupt local OAB file | Delete %LocalAppData%\MDaemon DMCI\OAB and force re-download. |
However, one of the biggest challenges for organizations migrating away from Exchange—or trying to avoid its high licensing costs—is maintaining native collaboration features in . This is where MDaemon DMCI (Direct Message Collaboration Interface, often referred to as the MDaemon Connector for Microsoft Outlook) becomes critical. mdaemon dmci
| Feature | IMAP/POP3 | MDaemon DMCI | | :--- | :--- | :--- | | Shared Calendars | ❌ Not natively | ✅ Full support | | Global Address List (GAL) | ❌ No | ✅ Yes, auto-updating | | Free/Busy time lookup | ❌ No | ✅ Yes | | Server-side email rules | ❌ Limited | ✅ Full (Sieveless) | | Public Folders | ❌ No | ✅ Hierarchical sync | | Out-of-Office (vacation) mgmt | Requires webmail | ✅ Direct from Outlook | | Offline Address Book (OAB) | ❌ No | ✅ Yes | | Symptom | Likely Cause | Solution |