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Sync calendars across multiple exchange servers

Posted on 2013-06-03
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Last Modified: 2013-06-11
Hi,
  I have a user who is a member of organization orgA and orgB.  He has an exchange account in both organizations user@orgA & user@orgB.  Using Outlook 2010 he can see both of his accounts with email and calendars etc..

How can I configure either outlook or the exchange server at orgA to sync his Calendars?  Both of the organisations need to see the users availability, so it can't be just a view in outlook.

Cheers.
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Question by:IIID
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Expert Comment

by:SreRaj
ID: 39218183
Hi,

You can share Free/Busy information with users in another organization thru Federated Delegation in Exchange Server 2010.

When you create an organization relationship with an external organization, users in the external organization can access your users' free/busy information. No replication of GAL information is required. With this configuration in place, Outlook 2010 and Office Outlook Web App users can simply enter the SMTP address of an external recipient when scheduling meetings.

The following are required for organization relationships:

An Exchange 2010 Client Access server exists in each Exchange organization.
Each Exchange organization has created a federation trust with the Microsoft Federation Gateway.
Each Exchange organization has configured a federated organization identifier. Domains used for generating users' e-mail addresses have been added to the organization identifiers.
An organization relationship exists in each corresponding organization.
The Mailbox servers that are hosting user mailboxes can reach the Microsoft Federation Gateway servers and the federated partner organizations CAS servers.
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Author Comment

by:IIID
ID: 39218190
Hi,
  That looks like a great solution, except I have no control over orgB.  I can ask them to set this up - but as I have no control over what they do with the servers, I have to assume they will not.

Is there another way to do this?

Cheers,
  Iain
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Accepted Solution

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SreRaj earned 1500 total points
ID: 39221773
Federated delegation uses the Microsoft Federation Gateway, a cloud-based service offered by Microsoft, as the trust broker between your on-premises Exchange 2010 organization and other federated Exchange 2010 organizations. This requires configurations be made on both the organizations.

There are third party solutions which offers calendar sync between multiple PCs and does not depend on Exchange Server. I have not tried any of these solutions before and not sure on how effective these are. Following are the links to couple of such products.

http://www.officecalendar.com/
http://sharecalendar.4team.biz/
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