Outlook Calendar Error “The attachment size exceeds the allowable limit”, even when there is no attachment

Question

I have an outlook meeting series that occurs weekly. Every week, I open the current occurrence, attach the current week’s meeting materials and send an update to the invites. I have done this for the same meeting series for several years. Recently, I started to run into a problem where every time I try to update or cancel a meeting occurrence I received the error “the attachment size exceeds the allowable limit” regardless of whether or not I have an attachment. I am not even able to cancel the series in order to start fresh.

I have 2 questions regarding this issue:

1. Is there any way to send attachments on the occurrence of a meeting invite without running into this issue?
2. Is there any way to remove this meeting series?

Answer 1

I have had exactly the same problem for the past week or so. I came across this post which has helped me to resolve the issue.

The problem seems to be that there is a limit when working in 'cached exchange mode'. I did the following in Outlook 2007:

1. Go to 'Tools > Account Settings...'
2. On the 'E-mail' tab click on your account
3. Click 'Change...'
4. Uncheck 'Use Cached Exchange Mode'
5. Click 'Next >' - you will see a dialogue box advising you that you will need to restart outlook; click 'OK'
6. Click 'Finish'
7. Click 'Close'
8. Close and restart Outlook
9. You should now be able to delete the appointment that was giving you the error

If you need cached exchange mode to be enabled (for example, if you are using Windows Desktop Search on your PC), go through this process again but this time check the 'Use Cached Exchange Mode' box in step 4.

Answer 2

This has happened to me again. Disabling cached exchange mode did not work. I used the 'MFCMapi Method to check for attachments' to remove them this time which worked.