Microsoft Office Outlook - The messaging interface has returned an unknown error

Posted on 2007-04-05
Medium Priority
Last Modified: 2012-05-05
I purchased 2 new Dell computers with Office 2007 Professional installed. We removed that software and replased it with Office 2003.
One computer was a replacement and the other is going to be used by a new employee who has not started yet.
Outlook 2003 seems to work until you try to reply to all on a email message, The both computers receive a message Microsoft Office Outlook - The messaging interface has returned an unknown error. restart office
Question by:esldmkeenan
  • 2
LVL 97

Expert Comment

ID: 18859532

1. Register an important Outlook file. Go to Start > Run and type regsvr32 OLE32.DLL
Do the same for INETCOMM.DLL

2. Disable Outlook Addins.  Go to Tools > Options > Other > Advanced Options > Addin Manager or COMM/Addins and disable the addins.

3. Check if an external program running in the background is interfering with Outlook. Check Firewall, antivirus, antispyware, antispam, and all Norton programs. Disable these programs one at a time.

5. Create a new Outlook profile.

5. Repair Outlook. With Outlook open, go to Help > Detect and Repair.

6. If no joy, reinstall Outlook.  Go to Add/Remove Programs and highlight Microsoft Office. Click on Install/Uninstall.  A menu will pop allowing you to choose repair or reinstall.

Author Comment

ID: 18875648
I reformated the drive and reloaded the applications. Thanks for responding.
LVL 97

Expert Comment

ID: 18876120

Glad reformating and reinstall OS fixed the problem for you. Creating a new Outlook profile would have fixed the problem that you described.

Accepted Solution

Computer101 earned 0 total points
ID: 19280256
PAQed with points refunded (250)

EE Admin

Featured Post

Easily manage email signatures in Office 365

Managing email signatures in Office 365 can be a challenging task if you don't have the right tool. CodeTwo Email Signatures for Office 365 will help you implement a unified email signature look, no matter what email client is used by users. Test it for free!

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

When you see single cell contains number and text, and you have to get any date out of it seems like cracking our heads.
Outlook is not just an email client. It's a personal information manager that has great features. Sometimes you may confront serious problems which leave you helpless. For a novice user, troubleshooting the problem is not easy. I've listed top 10 ti…
This Experts Exchange video Micro Tutorial shows how to tell Microsoft Office that a word is NOT spelled correctly. Microsoft Office has a built-in, main dictionary that is shared by Office apps, including Excel, Outlook, PowerPoint, and Word. When …
Watch the video to learn how one can deal with PST file corruption issue with an outstanding Kernel for Outlook PST Repair Tool easily. Using this tool, non-technical users can swiftly perform the repair process to restore their essential data witho…

607 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question