Individual Storage Table (PST) records of Outlook, again and again, may capitulate to numerous sorts of infection due to the various inside and external factors. A commonplace sign of Outlook PST corruption is the introduction of an error message of the sort “the helpful association point has returned a dark error”.


Expecting the issue drives forward restart Outlook. You may receive such messages while trying to peruse messages, sending faxes. “Outlook the Messaging Interface Unknown Error” making another timetable thing and removing messages, plan things, or contacts.

Around here at ARZHOST we as often as possible get requests to fix this misstep for our customers as a part of our Server Management Services.

Today at, could we see a couple of techniques our Hosting Expert Planners follow, to fix this effectively for our customers.

What causes ‘The Messaging Interface Has Returned An Unknown Error’?

“Outlook the Messaging Interface Unknown Error” Microsoft Outlook customers reliably get an “advising point regarding association has returned a dark mistake” message as spring up each time Personal Storage Table (PST) record is tainted.

Coming up next are a part of the purposes behind this error:

  1. The presence of degradation in the PST records.
  2. Any inward issues with the MS Outlook illuminating UI.
  3. Right, when the default transport region is set to Personal Folders (.PST) record and we are using Offline Folder (.OST) report.
  4. The message is adjusted once we save the copy in the drafts coordinator.
  5. Sent message in Outlook Rick Text Format joins an association.
  6. Either the message is sent or saved by tapping on Save on the File menu.
  7. The message is being sent using an OST record
  8. No development in the record for a lengthier out period

Methods to fix ‘The Messaging Interface Has Returned An Unknown Error’

A couple of methods used by our Hosting Expert Planners to fix ‘The Messaging Interface Has Returned An Unknown Error’ are given underneath:

1: Restart MS Outlook

The most straightforward plan when such errors spring up is to restart MS Outlook.

In any case, “Outlook the Messaging Interface Unknown Error” conceivably works when the error is a direct result of educating the point regarding connection issues.

2: Fix an Outlook data report (.pst) record

Coming up next are the means our Support Techs use to fix the Outlook data report.

1: Leave Outlook and inspect to one of the going with record regions:

  • Perspective 2019: C:\Program Files (x86) \Microsoft Office\root\Office16
  • View 2016: C:\Program Files (x86) \Microsoft Office\root\Office16
  • Outlook 2013: C:\Program Files (x86) \Microsoft Office\Office15
  • Angle 2010: C:\Program Files (x86) \Microsoft Office\Office14
  • Take 2007: C:\Program Files (x86) \Microsoft Office\Office12

2: Then, Open SCANPST.EXE.

3: Select Browse to pick the Outlook Data File (.pst) we want to channel.

4: Click Start to begin the result.

5: Accepting the range shows errors, we can pick Repair to start the cycle to fix them.

To change the default name or region of this support archive, enter the name of the support record box, enter another name, “Outlook the Messaging Interface Unknown Error” or choose to examine and pick the report we want to use.

6: Right when the upkeep is done, start Outlook with the profile related to that Outlook Data File.

3: Make New PST File

The development of another PST record incorporates making another PST report and acquiring the information from the main PST.

1: Leave Outlook thoroughly, go to Start – > Settings, and snap Control Panel.

2: Twofold tap Mail, go to Services tab, click Personal Folders, and snap Remove.

3: Click Add, go to the Available information organizations box, click Personal Folders, and snap OK.

4: Then, type the customer’s first name in the File name box, click Open, click OK twice, and leave Control Panel.

5: Start Outlook, start working as anyone might expect, and check to accept the issue is settled.

Accepting that the issue has been settled. “Outlook the Messaging Interface Unknown Error” we can import the information from the main PST records by continuing with the means given under:

To Import Information from the Original PST:

1: First go to the File menu and snap Import and Export.

2: After that snap Import from a singular envelope record (.pst) in the Choose an action to perform box and snap Next.

3: Then, type the way to the PST record in the File to import box and snap Next.

4: Assurance to pick Personal Folders and snap Finish.

4: Make a New Outlook Profile

On occasion making another Outlook Profile can fix ‘The Messaging Interface Has Returned an Unknown Error ‘

“Outlook the Messaging Interface Unknown Error” The resources to follow are given underneath:

  1. First, take Settings and snap Control Panel and DoubleClick Mail, click Show Profiles and snap Add.
  2. Then, select the organizations we need and snap Next.
  3. Give significant information associated with the organizations on Inbox Setup Wizard.
  4. Type new and click Next, when actuated to enter the way to PST records, and complete the means in Inbox Setup Wizard.
  5. Go to the General tab, put in any measure of work Microsoft Windows Messaging, use this profile box, select the new profile, and snap Close.
  6. Finally, open Outlook and start filling in amazingly.

5: Present a New Set of MAPI records

Revealing Application Programming Interface for Outlook, typically known as MAPI is an API for architects to use in their applications to make messages, store those messages, enable admonitions for messages.

MAPI subsystem requires an illuminating application, for instance, Microsoft Outlook to be presented on the machine as a fundamental. “Outlook the Messaging Interface Unknown Error” MAPI library records are taken care of in the maintained transformations of Windows system under the way:

  • <drive>/Windows/System32/mapi32.dll

then again

  • <drive>/Windows/syswow64/mapi32.dll.

The information associated with the MAPI foundation can be found in the library editor under the way:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Messaging Subsystem.

1: To fix the Outlook crash issue, we need to at first close all illuminating applications or email applications like Outlook.

2: Then, go to the library director way:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Messaging Subsystem.

3: After this, item and a short time later delete the current record under this coordinator.

Then, at that point, move the mapi32.dll report to another region from the current region

  • <drive>/Windows/System32/mapi32.dll
  • of course
  • <drive>/Windows/syswow64/mapi32.dll

4: Go to the Microsoft webpage and download the latest mapi32.dll record suitable with the Outlook structure and paste it nearby in the above advance.

5: Finally, we can restart Windows and subsequently open Outlook.

6: Reinstall Windows

If this large number of procedures crash and burn. “Outlook the Messaging Interface Unknown Error” It is the principal to reinstall the Windows in the system.

7: Reinstall Outlook

Guarantee Outlook is fixed best in class. “Outlook the Messaging Interface Unknown Error” If it is, have a go at reinstalling Office.

8: Confirm if Outlook Is in Compatibility Mode

“Outlook the Messaging Interface Unknown Error” Steps to confirm whether Outlook is in Compatibility Mode:

  1. First, we want to close Outlook and a while later head to “Start Menu”. Enter “outlook.exe” in the chase field.
  2. Moreover, next right-click the shown program and select “properties” from the right snap menu.
  3. In the popup trade box, change to the “Closeness” tab and check to expect that Outlook is running in similitude mode. Expecting it is, deselect “Run this program in closeness mode for”. In case not, this error should begin for various reasons.

9: Void the Deleted Items Folder

Maybe the most straightforward technique for fixing “the illuminating association point has returned a dark error’ is to release the Deleted Items envelope and thereafter effort to remove the message again.

To release the Deleted Items envelope. “Outlook the Messaging Interface Unknown Error” we need to right-tap on the Deleted Items coordinator and thereafter select the Empty coordinator.


To lay it out simply, “Outlook the Messaging Interface Unknown Error” we saw what are the establishments forgetting “the illuminating point regarding collaboration has returned a dark error”. Today at, we saw various procedures that our Hosting Expert Planners use to fix this without any problem.