Blane Smith

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If you have an exchange server in the onpremise local AD then you can do it from Exchange management console for exchange 2010 server or you can use EAC for exchange 2013 server.<br />
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If you don't have any exchange servers in your local AD then probably you need to do it manually from local AD as described above.
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If you have an exchange server in the onpremise local AD then you can do it from Exchange management console for exchange 2010 server or you can use EAC for exchange 2013 server.

If you don't have any exchange servers in your local AD then probably you need to do it manually from local AD as described above.

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I am trying to add/remove aliases to an account in Microsoft 365 and get this error:<br />
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The operation on mailbox &quot;Blane Smith&quot; failed because it's out of the current user's write scope. The action 'Set-Mailbox', 'EmailAddresses', can't be performed on the object 'Blane Smith' because the object is being synchronized from your on-premises organization. This action should be performed on the object in your on-premises organization.
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I am trying to add/remove aliases to an account in Microsoft 365 and get this error:

The operation on mailbox "Blane Smith" failed because it's out of the current user's write scope. The action 'Set-Mailbox', 'EmailAddresses', can't be performed on the object 'Blane Smith' because the object is being synchronized from your on-premises organization. This action should be performed on the object in your on-premises organization.

Cannot remove email alias for account 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.