The messaging interface has returned an unknown error.

Asked By 980 points N/A Posted on -
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Hi guys,

I have a problem with my Microsoft Office Outlook, while I was using Microsoft Office Outlook reader in the middle of my reading with my email, Microsoft Office Outlook stopped and displayed an error message, the error message stated that Microsoft Office Outlook interface has returned an unknown error. 

If the problem persists, restart Outlook.

Microsoft Office Outlook

The messaging interface has returned an unknown error.

If the problem persists, restart Outlook.

After I got the error message, I restated my computer in hope its just a minor glitz, but when I am back with email reading, after a short while same problem persisted,

Please help me figure out what went wrong with my Microsoft Office Outlook ,

Thanks a lot.

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Best Answer by BenHorne
Best Answer
Best Answer
Answered By 0 points N/A #123070

The messaging interface has returned an unknown error.

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Hello,

I think I can help you, just follow these steps:

1. Go to File menu, click Print. 
2. Click Page Setup. 
3. Go to Format tab, clear the TaskPad check box. 
4. Click OK to close the Page Setup dialog box. 
5. With the Daily Style print style selected, click OK to print the shared calendar.

You may also “reset” the Outlook MAPI file first, notice that it is not a part of the solution.

Answered By 590495 points N/A #123071

The messaging interface has returned an unknown error.

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Symptoms of this is when you send a fax, create item Calendar in Outlook, send a fax but all failed and unsuccessful.

You exceeded the limit in .pst file which the work around is to upgrade the large tables. Deleting this folder will stop this error from popping up.

Close the Outlook email client.
Go Start, Settings and Control Panel.
Go to Mail and Fax and click on Services tab.
Personal Folders is next to click and Properties.
This has to be in the correct Path box and click OK.
Go back to start, Programs and Accessories.
Point to System Tools, and go to Inbox Repair Tool.


In this Drives box, enter or type your desired Personal Folders file and click Start and OK after the scan is finished.
Start Outlook and this should fix the problem.

This link provides you great help as reference. https://support.microsoft.com/en-us/help/283175/-the-messaging-interface-has-returned-an-unknown-error-error-message-i

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