Fix Outlook errors when opening
If you are having trouble opening Outlook while using Microsoft 365 from 123 Reg, find your specific error to fix it.
| If | Do this |
|---|---|
| You see the error: The action cannot be completed. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action. | Try these Outlook troubleshooting steps. |
| You see the error: An encrypted connection to the server could not be established... | Clear your Windows Credential Manager. |
| You see the error: Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The operation failed. | Check out this solution from Microsoft. |
If you're not seeing one of the error messages above, test Outlook for connectivity issues.