[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now


Calendar Error

Posted on 2005-05-02
Medium Priority
Last Modified: 2011-09-20
I am receiving the following error message running Outlook 2003 with Office XP and Windows XP SP2 when trying to enter an appointment or meeting in my Calendar:

"The messaging interface has returned an unknown error.  If the problem persists, restart Outlook."

I have restarted Outlook to no avail.  I have searched Microsoft's site to no avail.  Can you help me?

Joseph Alford
Question by:joseph_alford
  • 3
  • 2

Expert Comment

ID: 13920167
Try recreating your Calendar -

If you have a lot of data in your calendar that you don't want to manually recreate, use the import/export wizard to export your calendar into a .pst file.

You cannot by default delete the Calendar through the Outlook client, but you should be able to through webmail -

After deleting the Calendar, empty your deleted items folder to completely remove it.

Rclick and choose new folder - name It Calendar and in the drop down box, make sure to have it say it contacins Calendar options

If you exported your data from your old Calendar, use the import/export wizard again to repopulate your calendar.

Author Comment

ID: 13921906
To madspire:

I don't have anything I care that much about in my calendar.  I tried to delete my calendar using Outlook Web Access and was unsuccessful.  Is that how you meant for me to delete my calendar?  In help is greatly appreciated.


Expert Comment

ID: 13925981
I did mean through web access, but if it doesn't work... I'm not sure if that's a restricted setting by the Exchange admin or if it's just not possible in 2003 like it was in 2002. Unfortunately, I'm not in an environment at the moment where I can test this out -

There is a way you can delete the calendar through the comand prompt - This is good for every version of Outlook from 97 to 2002, but again, I haven't tried it on 2003.

If deleting and recreating the items that cannot be opened does not correct the problem, perform the following steps:

1. Back up all mailbox information by downloading messages to a PST. Personal Folders can be added to your profile by selecting Services from the Tools menu and choosing Add.  
2. In the Outlook client, select Import and Export from the File menu.  
3. Follow the Import and Export Wizard and select Export to a File.  
4. Select a file name and select Calendar as the file to Export from.  
5. Delete the Calendar folder; to do this, start an Exchange Client from the command line by typing exchng32. The calendar folder can be deleted from the Exchange Client because it is viewed as a standard folder and not a required Calendar folder.  
6. Recreate the Calendar folder by starting Outlook from the command line using Outlook /resetfolders.  
7. Move all messages back from the PST to the mailbox. From the File menu, choose Import and Export  

If this fails, you can always try the standard Detect and Repair feature of Outlook - with 2003 you will need access to the Office 2003 cd - if you run detect and repair without having the cd, you may not be able to open any Office program until you do have the cd.

To run Detect and Repair - from outlook, click on Help<Detect and Repair<check both options to restore shortcuts and discard customized settings.
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Author Comment

ID: 13938589

I tried what you suggested.  But, I am unable to find the file exchng32 anywhere.  I have done a search on my local machine running Outlook 2003 Client and on our Exchange Server running Exchange Server 2003 Standard Edition.  Is this perhaps an Outlook 2002 or older?  Thanks for your suggestions but am still unable to add anything to my Calendar in Outlook 2003.


Author Comment

ID: 13939118
To all:

I have solved my problem.  I am running ShoreTel software that works in conjunction with Outlook 2003 and our new Voice over IP phone system.  One of the configuration questions says: "When posting to this Calendar, use ShoreTel".  This box was checked, evidently when the software was installed.  There are two other options: "Use IPM.Appointment" or "Use Forms".  I checked "Use IPM.Appointment" and now everything works fine.  I did not solve this, I stumbled on to the answer.  If anyone else encounters this problem using ShoreTel software, be sure to try this.

Joe Alford

Accepted Solution

GhostMod earned 0 total points
ID: 14000702
PAQd, 125 points refunded.

Community Support Moderator

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Changing a few Outlook Options can help keep you organized!
By default Outlook 2016 displays only one time zone in the Calendar. The following article explains how to display two time zones in one calendar view.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
Suggested Courses

873 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