Calendar Meeting - Adding new attendees sends update to everyone on meeting list (delegated user)

Hi There, 

I have an issue with a group of PA's who are experiencing the following:  - When they go to add new attendees to an a meeting request that they have already setup, they follow the usual steps of going to the scheduling assistant and adding the new attendees.  - They then click 'Send Update' and select 'Send updates only to added or deleted attendees' However everyone on the meeting is then updated rather than just the new users.  Now the odd thing is this.  All these PA's are delegates of managers, and they only experience this issue when they create/manage meetings from their managers calenders.  When they do it from their own calenders the issue doesn't occur and new attendees are the only people who are notified. 

Has anyone got any solutions to getting this sorted?

Thank You

Edit: Users are on 365, using Outlook 2010. 

  • Edited by 2JZ 2 hours 26 minutes ago
December 6th, 2013 4:29am

Quick update:

I started the users outlook in safe mode to disable any add-ins from starting. 

The user was successfully able to add new attendees to meetings and send the update to only those that were added, rather then everyone. 

My next step of diagnoses is to figure out which add-in is causing the conflict and disable it. 

Edit:

The current add-in's on the users Outlook is:

Enterprise Vault Add In:
Microsoft Exchange Add-In:
Microsoft Outlook Social Connector:
Sharepoint Server Colleague:
OneNote Notes about Outllook Items:
Microsoft VBA 

I think I will have to go through one by one and see which causes the issue. Anyone have any heads up on which one it could be?

  • Edited by 2JZ 34 minutes ago
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December 6th, 2013 5:54am

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