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Try running the IDfix tool and following the troubleshooting steps in the article below:<br />
<br />
<a href="http://support.microsoft.com/kb/2647098" rel="ugc">http://support.microsoft.com/kb/2647098</a>
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Try running the IDfix tool and following the troubleshooting steps in the article below:

http://support.microsoft.com/kb/2647098 [http://support.microsoft.com/kb/2647098]

Indie101

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Thanks I got that article myself
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Anyone done this recently, real world experience
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Anyone done this recently, real world experience

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Any best way to find duplicate proxy addresses through powershell?
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Any best way to find duplicate proxy addresses through powershell?

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The following errors occurred during synchronization:<br />
Identity<br />
<br />
Error Description<br />
<br />
sourceAnchor<br />
<br />
test account name<br />
<br />
Unable to update this object because the following attributes associated with this object have values that may already be associated with another object in your local directory services: [ProxyAddresses SMTP:Correct or remove the duplicate values in your local directory. Please refer to<a href="http://support.microsoft.com/kb/2647098" rel="ugc">http://support.microsoft.com/kb/2647098</a> for more information on identifying objects with duplicate attribute values.
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The following errors occurred during synchronization:
Identity

Error Description

sourceAnchor

test account name

Unable to update this object because the following attributes associated with this object have values that may already be associated with another object in your local directory services: [ProxyAddresses SMTP:Correct or remove the duplicate values in your local directory. Please refer tohttp://support.microsoft.com/kb/2647098 for more information on identifying objects with duplicate attribute values.

Duplicate or invalid attributes prevent directory synchronization in Office 365

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.